The impeachment of President Andrew Johnson in 1868 stands as a stark illustration of a profound political and constitutional crisis, born not from high crimes and misdemeanors in the traditional sense, but from a fundamental clash over the direction of Reconstruction and the balance of power between the executive and legislative branches. While the formal charges centered on Johnson's alleged violation of the Tenure of Office Act, the underlying currents ran deeper, encompassing his defiant stance against Congressional authority, his conciliatory approach to the defeated South, and the deep animosity he fostered with Radical Republicans. Ultimately, Johnson's acquittal by a single vote did not erase the significance of the proceedings; instead, it solidified the precedent of impeachment as a potent political weapon, albeit one fraught with peril and susceptible to partisan manipulation.
The proximate cause for the impeachment effort was Johnson’s repeated confrontations with Congress over Reconstruction policy. Following Lincoln’s assassination in April 1865, Johnson, a Southerner and former Democrat, inherited a nation grappling with the immense task of reintegrating the Confederate states. Unlike Lincoln’s more lenient approach, Johnson’s policies—outlined in his Proclamation of Amnesty and Reconstruction in May 1865—largely bypassed federal protection for newly freed slaves and allowed former Confederate leaders to regain political power rapidly. Congress, dominated by Radical Republicans like Thaddeus Stevens and Charles Sumner, viewed these measures as a betrayal of the Union’s victory and a dangerous concession to the old Southern order. They responded by passing legislation, such as the Civil Rights Act of 1866 and the Reconstruction Acts of 1867, designed to assert federal control over the South and guarantee civil rights for African Americans. Johnson’s persistent vetoes and his open defiance of these acts fueled the animosity, leading Congress to believe he was actively obstructing their constitutional mandate.
The Tenure of Office Act, passed in March 1867 over Johnson’s veto, became the legal casus belli for impeachment. This act prohibited the president from removing civil officers without the Senate’s consent, a direct challenge to executive prerogative. Johnson, seeing it as an unconstitutional infringement on his authority, deliberately violated it in February 1868 by dismissing Secretary of War Edwin Stanton, a Lincoln appointee and a key figure in enforcing Congressional Reconstruction. This act provided the House of Representatives with the specific grounds to impeach. The subsequent trial in the Senate was a highly politicized spectacle. The prosecution, led by Stevens and Benjamin Butler, presented a case that, while legally technical, was undeniably driven by a desire to remove a president whose policies they abhorred. The defense, in turn, argued that the charges were politically motivated and that the Tenure of Office Act itself was unconstitutional, a point later validated by the Supreme Court in Myers v. United States (1926).
The acquittal of Andrew Johnson in May 1868, by a margin of 35 to 19, demonstrated the deep divisions within the Senate and the hesitancy of some Republicans to fully weaponize impeachment beyond its intended constitutional bounds. While seven Republicans joined the Democratic minority in voting for acquittal, their reasons varied. Some, like Senator Edmund Ross of Kansas, expressed genuine doubts about the legal sufficiency of the charges or the wisdom of removing a president mid-term. Others, like Senator John Sherman of Ohio, worried about the precedent of such a partisan conviction and the potential for future presidents to be crippled by constant threats of removal. This narrow escape highlighted the profound risk of impeachment devolving into a simple party-line vote, undermining the judiciary's supposed impartiality and the gravitas of the presidential office.
The impeachment of Andrew Johnson left an indelible mark on American politics. It established that impeachment was a viable, albeit extreme, tool for addressing perceived presidential misconduct or political opposition. However, the deeply partisan nature of the proceedings and Johnson’s subsequent acquittal served as a cautionary tale, leading to a long period where impeachment was largely avoided. It underscored the tension between presidential independence and congressional oversight, a dynamic that continues to shape American governance. The events of 1868 did not resolve the fundamental disagreements over Reconstruction, which continued to be a contentious issue, but they did significantly alter the perception of executive power and the boundaries of impeachment.