Democratic lawmakers and presidential candidates are calling for the impeachment of Supreme Court Justice Brett Kavanaugh.

That's coming after The New York Times reported on a former college classmate of Kavanaugh's who tried to tip off US senators and the FBI about an unreported sexual misconduct allegation.

"Brett Kavanaugh lied to the U.S. Senate and most importantly to the American people," California Sen. Kamala Harris said in a tweet Sunday. "He was put on the Court through a sham process and his place on the Court is an insult to the pursuit of truth and justice. He must be impeached."

In US history, just 19 federal officials one senator, one cabinet secretary, two presidents, and 15 judges were impeached.

Of those impeachments, just six have occurred in the past 80 years.

President Richard Nixon, the only president to resign from office, was actually never impeached. He stepped down before proceedings had begun. The two presidents who were impeached by the House, Bill Clinton and Andrew Johnson, were both acquitted by the Senate. No president has ever been bothimpeached by the House and convicted by the Senate.

Here are some of those impeachments.

An earlier version of this article was written by Allan Smith.

William Blount

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Tennessee Portrait Project/Wikipedia

The first federal officialto be subject to impeachmentwas Blount, a Tennessee senator, in 1797.

Blount was accused of conspiring to allow Britain to gain control of Florida and Louisiana in exchange forAmerican access to the Mississippi River and New Orleans. A letter outlining the plan was turned over President John Adams, who came to the conclusion that what Blount was trying to pull off amounted to a crime.

The House shortly after voted to hold impeachment hearings, but the Senate, taking responsibility for one of their own, took control of the matter and voted to essentially expel him from the governing body.

John Pickering

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Pickering, a district judge in New Hampshire, was impeached in 1803 and convicted by the Senate in 1804 for, among other things, being drunk.

President Thomas Jefferson accused Pickering of having bad morals because he was drunk while on the bench. Jefferson also accused the district judge of making unlawful rulings, but Pickering's drunkenness is what he'smore remembered for.

"I shall be sober tomorrow," Pickering said at the start of a November 1802 hearing, according to Politico . "I am now damned drunk."

West Hughes Humphreys

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West Hughes Humphreys was impeached for something that no federal official could find themselves subjected to in modern times: serving simultaneously as a US district court judge in Tennessee and as a Confederate judgein the same state at the beginningof the Civil War.

Impeached in 1862, Humphreys was subsequently convicted charges including calling for secession from the union, aiding an armed rebellion, and serving as a Confederate judge, among others.

One charge he was not convicted on? Confiscating property belonging toPresident Abraham Lincoln-appointed Tennessee Military Governor Andrew Johnson,the future president.

Speaking of Johnson...

Andrew Johnson

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Library of Congress

President Johnson, one of only two US presidents to be impeached, was famously loathed by many in Congress. So much so that Congress passed the Tenure of Office Act, which curtailed the president's ability to fire members of his Cabinet.

Johnson went ahead and tried to fire his secretary of war anyway, and was subsequently impeached by the House in 1868. He avoided conviction in the Senate by one vote.

The Tenure of Office Act was subsequently repealed in its entirety in 1887.

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