Who was the first American president to be impeached?

The first president to be impeached was Andrew Johnson, in 1868. Johnson was the 17th President of the United States. He was Vice President under Abraham Lincoln, and became President after Lincoln's assassination in April, 1865, near the end of the US Civil War.

After quarreling with Congress over Reconstruction in the South, Johnson was impeached by the House of Representatives. When he went to trial in the Senate, he was acquitted by one vote.

The only other president to be impeached was Bill Clinton in December 1998. Like Johnson, he was acquitted by the Senate, in February, 1999. Clinton is the first and only elected president to be impeached.

Richard Nixon, although investigated by Congress during the Watergate scandal, was never impeached. The impeachment process was not started before his resignation from office in 1974.

Impeachment is described in the U. S. Constitution, Article I, Section 2. Clause 5.

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