By Edecio Martinez, Stephanie Condon, Steve Chaggaris
/ CBS NEWS
Richard Nixon famously said, "I am not a crook," on Nov. 17, 1973, when denying his involvement in the Watergate scandal. Nixon is seen visiting US troops in Vietnam on March 1, 1970.
Nixon ultimately resigned as president on Aug. 8, 1974 after audio tapes revealed he was involved. He is seen at the White House on July 26, 1968.
After reports surfaced that Bill Clinton had an affair with former White House intern Monica Lewinsky, Clinton forcefully said on Jan. 26, 1998, "I did not have sexual relations with that woman." Turned out he did and he later admitted it in Aug. 1998. Clinton is seen delivering a speech on Sept. 21, 1991, in Los Angeles.
Former White House intern and Department of Defense employee Monica Lewinsky is seen in this photo. She reportedly had a year long affair with President Clinton.
Later that year, he was impeached by the House for lying about the affair under oath. Clinton is seen in this Nov. 14, 1997, photo during a press conference in Washington after acknowledging he became emotionally close to Lewinsky while she was a White House intern.
Former Sen. Gary Hart, D-Colo., who was dodging rumors of an extramarital affair while running for the Democratic nomination in 1987, dared reporters in a May 1987 New York Times article to "follow me around. I don't care. ... I'm serious. If anybody wants to put a tail on me, go ahead. They'd be very bored." Within days he dropped out of the race after the Miami Herald uncovered his affair with Donna Rice, who is seen on Hart's lap in this photo.
Democratic Rep. Anthony Weiner of New York resigned on June 16, 2011, three weeks after the release of lewd photos the married congressman sent to women over the Internet. During those three weeks, the congressman lied to the press about the photos, telling CBS News on June 1, "This was a hoax. It was committed on me, it was a prank, it was a relatively easy one to do, making fun of my name."
Weiner announces his resignation June 16, 2011 in the Brooklyn borough of New York City. The resignation comes ten days after the congressman admitted to sending lewd photos of himself on Twitter to multiple women.
Six-term Rep. Mark Foley, R-Fla., resigned in Sept. 2006 after allegations surfaced he sent sexually suggestive messages to male teens working as congressional pages. When first confronted about the messages, Foley denied any wrongdoing.
In 2008, however, he told the Associated Press some of the messages he sent were "extraordinarily inappropriate." Although he resigned, investigations into his actions ended without criminal criminal charges.
Former Rep. Gary Condit, D-Calif., found himself being asked a lot of questions after his former intern, Chandra Levy disappeared in 2001.
He publicly denied rumors that he had an extramarital affair with her. However, police later discovered evidence that proved otherwise. Condit is seen at a joint House-Senate Intelligence Committee hearing on 9/11 attacks Sept. 18, 2002 on Capitol Hill.
Former presidential candidate John Edwards began the lies about his personal life in Oct. 2007, when he called rumors of his extramarital affair, first published in the National Enquirer, "tabloid trash." By August 2008, he admitted to the affair and said he was "ashamed" of his conduct. He denied, however, fathering a child with his mistress Rielle Hunter.
Former Democratic presidential candidate John Edwards arrives at a federal courthouse with his mother Bobbie Edwards, May 25, 2012 in Greensboro, N.C.
In this photo, Rielle Hunter is seen in New York on June 26, 2012.
Then-South Carolina Gov. Mark Sanford made national headlines in June 2009 after mysteriously disappearing for five days. His office gave a whopper of a lie, saying he was hiking the Appalachian Trail when he was, in fact, visiting his mistress in Argentina.
Sanford ultimately told the truth, prompting calls for his resignation, spurring investigations into his behavior, and compelling his wife to file for divorce. Sanford left office at the end of his term, when his political career was effectively over. Sanford is seen in this June 24, 2009, photo during a press conference at the State Capitol in Columbia, S.C.
After years of investigating then-Gov. Rod Blagojevich, D-Ill., for corruption, it was revealed in Dec. 2008 that federal investigators were given authority to tape his phone calls. Defiantly, Blagojevich announced, "whether you tape me privately or publicly, I can tell you that whatever I say is always lawful and the things I'm interested in are always lawful." The next day, he was arrested; he
Blagojevich arrives for the verdict in his corruption retrial at the Dirksen Federal Courthouse on June 27, 2011, in Chicago. Jurors have reached a verdict on the 18 of the 20 counts that Blagojevich is being retried on after he allegedly tried to sell an appointment to President Barack Obama's vacated U.S. Senate seat.
Shortly after winning reelection in 1992, former Sen. Bob Packwood, R-Ore., faced sexual harassment allegations from 10 female ex-staffers. He denied the charges.
In 1995, after more women came forward, his diary was turned over to the Senate Ethics Committee and he faced expulsion from the Senate. Packwood resigned.
Then-Sen. Larry Craig, R-Idaho, was arrested in a 2007 sting operation at the Minneapolis-St. Paul International Airport after sexually soliciting an undercover officer. When explaining why he slid his foot under the bathroom stall to tap the foot of the officer in the adjacent stall, Craig famously explained he had a "wide stance" and maintained his innocence.
The senator pleaded guilty to a misdemeanor charge. He later filed a motion to withdraw the guilty plea, saying he did nothing wrong, but the motion was rejected.
Congressman Joe Wilson, R-S.C., isn't a liar himself, but he publicly - and very memorably - charged in 2009 that President Obama is a liar. In September of that year, President Obama delivered a speech before a joint session of Congress regarding health care reform. After Obama said extending health care to all Americans who seek it would not mean insuring undocumented immigrants, Wilson shouted out, "You lie!"
The interruption drew audible gasps from multiple members of Congress and boos from the left side of the aisle. Wilson walks into his office after talking to reporters outside his office on Capitol Hill, Sept. 15, 2009, in Washington, DC.