Explore current and historical political parties, map party control, and learn about polarization.
The Senate failed, barely, to secure a two-thirds majority in favor of convicting President Andrew Johnson
In 1866, the House voted 105-20 to try former Confederate President Jefferson Davis for treason -- the trial ultimately never occurred.
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On the final day of John Tyler's presidency, a broad coalition overrode his veto on a minor bill related to customs enforcement -- the first time congress ever overrode a presidential veto.
