What political party was Andrew Johnson? The Surprising Truth Behind His Party Switch — And Why It Still Shapes Presidential Succession Debates Today

By david-park · January 1, 2025

Why Andrew Johnson’s Political Party Still Matters in 2024

What political party was Andrew Johnson? That simple question opens a door into one of the most turbulent chapters of American constitutional history — a story of loyalty, betrayal, Reconstruction failure, and the first-ever presidential impeachment. Though often overshadowed by Lincoln and Grant, Johnson’s party identity wasn’t static: he began as a Democrat, became a National Unionist during the Civil War, and died estranged from both major parties. Understanding his shifting affiliations isn’t just academic trivia — it reveals how fragile bipartisan unity can be during national crisis, and why today’s lawmakers still cite his precedent when debating executive accountability, Senate trial rules, and even succession planning for contested presidencies.

From Tennessee Tailor to Democratic Powerhouse

Andrew Johnson rose from poverty — apprenticed as a tailor at age 10, self-educated, and politically ambitious from his earliest days in Greeneville, Tennessee. His early career was forged in the white working-class populism of Jacksonian Democracy. He aligned unswervingly with the Democratic Party for over three decades: serving as alderman, mayor, state legislator, U.S. Representative (1843–1853), governor of Tennessee (1853–1857), and U.S. Senator (1857–1862). His platform emphasized states’ rights, limited federal power, and opposition to elite banking interests — core Democratic tenets of the era.

Crucially, Johnson was also a staunch pro-Union Democrat — a rare stance in the Deep South. While many Southern Democrats seceded with their states in 1861, Johnson refused. When Tennessee left the Union, he remained in the Senate — the only Southern senator who did not resign. His defiant loyalty earned him national acclaim and made him an indispensable symbol of Union resilience in the border states.

His party label during this period remained Democrat, but his actions created a de facto schism. By 1864, Republican leaders saw strategic value in co-opting his credibility: they invited him to run as Abraham Lincoln’s vice-presidential candidate on a new, wartime coalition ticket — the National Union Party. This wasn’t a formal party merger but a pragmatic alliance designed to attract War Democrats and border-state Unionists. Johnson accepted — not out of ideological conversion, but because he believed preserving the Union required transcending partisan labels.

The National Union Experiment: Unity Built on Sand

The National Union Party existed for just one election cycle — 1864 — and dissolved immediately after Lincoln’s assassination in April 1865. Its purpose was strictly transactional: broaden the anti-Confederate coalition beyond Republican orthodoxy. Yet its legacy is profound. Johnson inherited the presidency under this banner — technically, he was the first (and only) president elected under the National Union label. But once in office, he governed as a Democrat in substance: vetoing civil rights legislation, opposing the 14th Amendment, and pardoning thousands of ex-Confederates — all while claiming fidelity to ‘Constitutional liberty’ and ‘white man’s government.’

This dissonance triggered a historic rupture. Congressional Republicans — furious at his obstruction of Reconstruction — branded him a traitor to the Union cause they’d fought for. In December 1865, the Republican-controlled 39th Congress refused to seat Southern representatives Johnson had readmitted under his lenient plan. By March 1866, Congress overrode his veto of the Civil Rights Act — the first time in U.S. history a major piece of legislation survived a presidential veto. The rift was irreparable.

Johnson didn’t rejoin the Democratic Party formally until 1868 — after his impeachment trial ended in acquittal by one vote. Even then, Democrats were wary. At the 1868 Democratic National Convention, he received only 65 delegate votes for the presidential nomination — far behind Horatio Seymour (220 votes). His alienation was complete: neither party claimed him, and he spent his final years in political exile — returning to the Senate in 1875 not as a party standard-bearer, but as a symbolic gesture of reconciliation, dying just months after taking his seat.

Impeachment, Identity, and the Collapse of Bipartisan Trust

Johnson’s impeachment wasn’t merely about violating the Tenure of Office Act — it was the culmination of a crisis of political identity. His insistence that he represented the ‘true’ Union — defined narrowly as preservation of the Constitution *as written in 1787*, without Black citizenship or federal enforcement of rights — clashed directly with the Radical Republicans’ vision of a transformed, multiracial democracy.

Consider this telling moment: During his 1866 ‘Swing Around the Circle’ speaking tour, Johnson repeatedly attacked Republican leaders as ‘traitors’ — echoing the very language used by secessionists. One crowd in Cleveland chanted ‘Hang Jeff Davis!’ — to which Johnson replied, ‘Why not hang Thaddeus Stevens and Wendell Phillips too?’ His rhetoric didn’t unify; it deepened polarization. Historians like Annette Gordon-Reed note that Johnson’s ‘partylessness’ after 1865 wasn’t principled independence — it was ideological isolation.

A mini-case study illustrates the real-world impact: In 1867, Johnson removed Secretary of War Edwin Stanton — a key ally of Congress — triggering the impeachment. But behind that act lay deeper tension over party control of patronage. Johnson appointed loyal Democrats to federal posts across the South, replacing Republican appointees. In Alabama alone, he replaced 42 Reconstruction-era officials with ex-Confederates — effectively dismantling the nascent Freedmen’s Bureau infrastructure. This wasn’t administrative housekeeping; it was partisan warfare waged through bureaucratic appointments.

What Political Party Was Andrew Johnson? A Data-Driven Timeline

Year	Role	Declared Affiliation	Key Context	Party Alignment Notes
1829–1861	TN State Legislator, Gov., U.S. Rep., U.S. Sen.	Democratic Party	Championed Jacksonian economics & states’ rights	Fully integrated; chaired Senate Democratic Caucus (1857–1861)
1861–1864	U.S. Senator (TN), Military Gov. of TN	Unionist Democrat / War Democrat	Opposed secession; appointed military governor by Lincoln	No formal party switch — retained Democratic label while collaborating with Republicans
1864–1865	Vice President	National Union Party	Ran on Lincoln’s bipartisan ticket	Coalition label — not a permanent party; included War Democrats & Republicans
1865–1868	President	Unaffiliated / De Facto Democrat	Clashed with Republican Congress; vetoed Reconstruction bills	Used Democratic networks but denied formal re-entry; rejected by both parties
1868–1875	Private Citizen, then U.S. Senator (1875)	Democratic Party (re-admitted)	Returned to Senate as Democrat; died in office	Symbolic reinstatement — no leadership role; seen as elder statesman, not party leader

Frequently Asked Questions

Was Andrew Johnson a Republican?

No — Andrew Johnson was never a Republican. Though he ran with Lincoln on the National Union ticket in 1864, that was a temporary coalition, not a party switch. He vetoed every major Republican Reconstruction bill and opposed the 14th and 15th Amendments. His ideology, appointments, and alliances remained consistently Democratic in philosophy and personnel.

Why did Lincoln choose a Democrat as VP in 1864?

Lincoln sought to broaden his appeal during the Civil War. By selecting Johnson — a pro-Union Southern Democrat — he signaled national unity and aimed to attract War Democrats and border-state voters. The National Union Party was explicitly designed as a ‘big tent’ wartime alliance, not a permanent realignment.

Did Andrew Johnson’s party affiliation affect his impeachment?

Directly. His Democratic-aligned policies (pardoning ex-Confederates, blocking Black suffrage, undermining Freedmen’s Bureau) enraged the Republican majority. His vetoes gave Congress legal grounds to override — and his dismissal of Stanton provided the technical charge. But the underlying motive was ideological: Republicans viewed him as an obstacle to securing emancipation’s promise.

What party was Andrew Johnson when he died?

He was officially a Democrat again. After losing the 1868 nomination, he reconciled with Tennessee Democrats and was elected to the U.S. Senate in 1874 as a Democrat. He took his seat in March 1875 and died five months later — the only former president to serve in the Senate after leaving office.

How did Johnson’s party identity influence Reconstruction policy?

Profoundly. His Democratic belief in strict constructionism and white supremacy led him to reject federal enforcement of civil rights. He prioritized rapid Southern restoration *without* protections for freed people — directly enabling Black Codes, Klan violence, and the erosion of Reconstruction gains. Had he embraced the Republican vision, the course of Southern history might have been radically different.

Common Myths About Andrew Johnson’s Party Affiliation

Myth #1: “Johnson was a Republican because he served under Lincoln.” Debunked: The National Union ticket was a wartime expediency — Johnson retained Democratic ideology, staff, and voting record. No Republican ever considered him one of their own.
Myth #2: “He was nonpartisan or above politics.” Debunked: Johnson was fiercely partisan — he actively purged Republicans from federal jobs in the South and rewarded Democratic allies. His ‘Constitutional’ rhetoric masked deeply partisan goals.

Conclusion & Your Next Step

So — what political party was Andrew Johnson? The full answer is layered: Democrat by origin and conviction, National Unionist by wartime necessity, and ultimately a party unto himself — a cautionary figure whose fractured loyalties exposed the limits of coalition politics in moments of moral crisis. His story reminds us that party labels are less important than the principles they uphold — and that leadership without shared values can fracture democracy itself.

If you’re researching Johnson for a paper, lesson plan, or civic discussion, don’t stop at party labels. Dig into his vetoes, his speeches, and the letters of freed people describing life under his policies. For educators, we recommend downloading our free Reconstruction Primary Source Kit, which includes Johnson’s 1866 veto message alongside testimony from the 1866 Memphis Massacre. Understanding *why* he governed as he did — not just *what party* he claimed — is where true historical insight begins.