Who else from the White House has faced criminal investigation?

Donald Trump is now the first former president and major party presidential nominee in American history to be convicted of a felony.

But he's not the first White House officeholder or candidate to face criminal investigation.

Trump's unprecedented 34 felony counts of falsifying business records follows the likes of former Presidents Richard Nixon and Bill Clinton's notorious in-office scandals, the conviction of Nixon's vice president, Spiro Agnew, and alleged campaign trail misconduct by presidential candidate John Edwards.

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The guilty verdict handed down by a 12-person New York jury yesterday still distinguishes Trump from predecessors, as historians have told USA TODAY.

Here's what to know about the past presidents and White House officials once under investigation.

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Bill Clinton and the Lewinsky case

Like Trump, whose New York trial centered around an alleged sexual encounter with an adult entertainer, Clinton saw salacious details of an extramarital affair on display during a months-long criminal investigation by special counsel Kenneth Starr in 1998. The Starr probe revealed Clinton had lied under oath by denying an affair with White House intern Monica Lewinsky during a lawsuit filed by Paula Jones, a former Arkansas state employee. Clinton was impeached in the House of Representative and was acquitted by the Senate in 1999.

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Richard Nixon dodges his own case

Before Clinton, one of the country's top presidential scandals occurred after June 1972, when a security guard at the Watergate building in Washington caught a break-in at the Democratic National Committee office.

(FILES) In this file photo taken on August 9, 1974 The 37th President of the United States, Richard Nixon, he bids farewell to the White House staff. At left is his son-in-law David Eisenhower (US President Dwight Eisenhower's grandson) who is married to his daughter Julie, hidden behind the President. - The break-in 50 years ago by Republican operatives at a Washington office led to the historical resignation of US president Richard Nixon -- but arguably it reverberated more deeply around the world with the coining of a single term: Watergate.Ever since the Potomac riverside building lent its name to one of Washington's greatest political crimes, -gate has become the signifier of choice for scandals worldwide -- a fact not lost on British Prime Minister Boris Johnson, nearly undone just this year by his own Partygate. (Photo by CONSOLIDATED NEWS PICTURES / AFP) (Photo by -/CONSOLIDATED NEWS PICTURES/AFP via Getty Images) ORG XMIT: 4 ORIG FILE ID: AFP_32CK89Q.jpg

The incident led back to then-President Nixon and the ensuing cover-up and controversy ultimately led to his resignation August 1974, two years into his second White House term. A host of Nixon aides, including his attorney general, were later convicted in the Watergate scandal.

Nixon bolted from office before Congress could impeach him. His vice president and successor Gerald Ford pardoned Nixon weeks after taking office, saving the disgraced former president from any charges or conviction.

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Spiro Agnew snags sweetheart deal

The Nixon administration was rocked by scandal that extended to the office of the vice president.

Nixon's original vice president was Spiro Agnew, who came under fire in 1973 for bribery allegations tracing back to his time as a county commissioner and governor of Maryland. Agnew faced an FBI investigation for bribery but was not prosecuted for the charge, according to FBI records.

Spiro Agnew, right, who was vice president under President Richard M. Nixon, and G. Gordon Liddy, one of the Watergate conspirators, attend the April 27, 1994 funeral of former US President Nixon in Yorba Linda, California. Agnew resigned the vice presidency during his second term and was replaced by Gerald Ford, who became president upon Nixon's 1974 resignation.

As Nixon was surrounded by his own scandalous circumstances, Agnew took a generous plea deal and resigned in October 1973 while pleading no contest to one count of federal income tax evasion. In exchange, he avoided political corruption charges, paid a $10,000 fine and served three years of unsupervised probation.

Agnew was replaced by Ford, who became president after Nixon's resignation.

John Edwards too faced hush money allegations

Another presidential candidate just over a decade ago faced his own hush money investigation.

Democrat John Edwards of North Carolina was indicted by a federal grand jury in 2011 for allegedly violating campaign finance laws by paying to cover up an affair with a campaign staffer during his 2008 run for office.

One major difference between him and Trump: Edwards was found not guilty on one count and ended up with a mistrial due to a jury deadlock on his five other charges.

This article originally appeared on USA TODAY: Trump preceded by these investigated presidents, candidates