The extramarital affair and subsequent resignation of retired four-star general David Petraeus as CIA director is just one of the many dramas that have unfolded after a president has won re-election. Here is a look at other scandals and controversies that have plagued presidents after voters returned them to the White House.
(CNN) -- Just as President Barack Obama secured his re-election, a scandal jolted his national security team.
The resignation of retired four-star general David Petraeus as CIA director over an extramarital affair followed by the investigation of the top U.S. commander in Afghanistan, Gen. John Allen, in relation to e-mail exchanges with a woman caught up in the Petraeus mess is just one of many dramas to unfold following a presidential re-election.
Is Petraeus pillow talk a security threat?
CIA Director David Petraeus stepped down Friday, November 9, 2012, citing an extramarital affair with his biographer, Paula Broadwell. Many questions surround the affair, including why it was necessary for Petraeus to resign and the future of his marriage to his wife, Holly. Here's a look at other U.S. sexual scandals that led to political stumbles and downfalls.
Photos: Public figures, private missteps
Here, we take a look at big scandals and controversies that plagued other presidents after voters re-elected them to the White House:
George W. Bush | HURRICANE KATRINA, 2005 President George W. Bush won re-election in 2004, defeating Democrat Sen. John Kerry. The Republican was a wartime president after the 9/11 attacks and managed to secure a second term as commander-in-chief.
Eight months after Bush's second inauguration, Hurricane Katrina destroyed parts of New Orleans and the Gulf Coast, killing more than 1,800 people. The Category Three storm made landfall on August 29, 2005, displacing hundreds of thousands of people and causing $108 billion in damage.
Bush was asked to declare a federal state of emergency for the city before the storm hit but delayed acting for days, leaving many without any aid.
A congressional report released in 2006 called the government response to the storm a "failure of leadership" that left people stranded when they were most in need. Bush left office at the end of his second term in 2009.
Bill Clinton | MONICA LEWINSKY, 1998 "I did not have sexual relations with that woman, Miss Lewinsky," President Bill Clinton said with his wife, Hillary, standing by his side at a White House news conference.
It was January 26, 1998, and several days earlier, news organizations began reporting the alleged affair between Clinton and Monica Lewinsky, a young White House intern.
Clinton eventually acknowledged a sexual relationship with Lewinsky and became only the second president to be impeached by the U.S. House, which alleged perjury and obstruction of justice following a lengthy investigation by an independent counsel.
However, the Senate acquitted him in 1999, and Clinton left office at the end of his second term two years later.
Ronald Reagan | IRAN-CONTRA AFFAIR, 1986 President Ronald Reagan did not blink at fighting communism in Grenada and in Central America, but funding of anti-communist rebels in Nicaragua would lead to the worst scandal of his administration. The secret and rogue operation under the direction of the National Security Council's Oliver North used the proceeds from weapons sales to Iran to fund the Nicaraguan Contras -- despite a congressional ban on such funding.
Ronald Reagan appeared on TV stating there were no "arms for hostages" deal but later admitted that there had been.
Richard Nixon | WATERGATE, 1972 The Watergate break-in triggered the slow unraveling of Richard Nixon's presidency.
On the night of June 17, 1972, operatives of Nixon's re-election campaign broke into offices at the Watergate Hotel complex in Washington -- headquarters of the Democratic National Committee.
Washington Post reporters Bob Woodward and Carl Bernstein uncovered a scandalous trail that led to the Oval Office and Nixon's resignation in 1974.
Opinion: 5 things we've learned from Petraeus scandal
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President George W. Bush's delayed response to Hurricane Katrina is considered by many to be his administration's greatest failure. Here, he tours the damage done by the storm as he consoles two sisters in Biloxi, Mississippi. (September 2, 2005)
After denying having any sexual relations with former White House intern Monica Lewinsky, President Bill Clinton admits to the affair and apologizes for misleading the country on December 8, 1998. He later becomes the second president in U.S. history to be impeached by the U.S. House.
President Ronald Reagan is questioned by reporter Helen Thomas six days before the disclosure that profits from arms sales to Iran were diverted covertly to Contra rebels in Nicaragua. (March 19, 1987)
The Nixon administration unraveled during Watergate. President Richard Nixon resigns. (August 9, 1974)
Former actor and California Republican Gov. Arnold Schwarzenegger made headlines in 2011 when his longtime wife, journalist Maria Shriver of the Kennedy clan, filed for divorce after learning Schwarzenegger had fathered a son with the couple's housekeeper. Schwarzenegger recently began talking publicly about the affair, released an autobiography and made a return to acting. He has said he hopes to win Shriver back.
Former president Bill Clinton's denial of his affair with then-intern Monica Lewinsky jeopardized his seat in the Oval Office. News of the affair surfaced in 1998, and Clinton became the second president to be impeached by the U.S. House when he was brought up on charges of lying to a grand jury and trying to influence the testimony of others but wasn't removed from office. He is still married to Secretary of State Hillary Clinton.
Sen. David Vitter, R-Louisiana, issued an apology "for a very serious sin in my past" after his phone number showed up in the records of Pamela Martin and Associates, and escort service run by Deborah Jeane Palfrew, aka the "D.C. Madam" 
Former U.S. Rep. Anthony Weiner, D-New York, caused a stir in Washington in 2011 when he was caught using social media to communicate with at least six women other than his wife, Huma Abedin. Weiner left office in his seventh term in Congress. Shortly after his resignation, news broke the Abedin was pregnant with their first child. Today, the couple is still married, and Weiner is a stay-at-home dad to their son. Weiner rejoined Twitter earlier this month.
Detroit Mayor Kwame Kilpatrick apologized to his wife and the city after romantic messages, reported by the Detroit Free Press, indicated the Democrat was having an affair with his chief of staff. The chief of staff, Christine Beatty, resigned, but Kilpatrick, said he would not. 
John Edwards, the former North Carolina senator and Democratic presidential hopeful, saw his political career spin off track when he finally admitted in 2008 that he was unfaithful to his cancer-stricken wife, Elizabeth Edwards. Edwards at first denied the affair but ultimately came clean about fathering a child with his campaign videographer, Rielle Hunter. Prosecutors accused Edwards of illegally using hundreds of thousands of dollars in campaign contributions to keep his pregnant mistress under wraps, but he was granted a mistrial on May 31, 2012. Elizabeth Edwards died in 2010.
Former Sen. Larry Craig, R-Idaho, agreed to step down temporarily as the leading Republican on Senate committees after details came out about his 2007 arrest in an airport in Minneapolis, Minnesota. 
Former Rep. Mark Foley, R-Florida, resigned in September 2006 after he was accused of sending sexually explicit instant messages and e-mails to congressional pages. Florida authorities opened an investigation, as did the FBI. Foley later checked into a treatment facility for alcoholism.
Weeks after separating from his wife, Los Angeles Mayor Antonio Villaraigosa acknowledged he had been having an affair with a local television reporter. 
Days before the House voted to impeach President Clinton, Rep. Bob Livingston, R-Louisiana, admitted to cheating on his wife. 
When then-South Carolina Gov. Mark Sanford went MIA for nearly a week in June of 2009, his staff told the public he was out hiking the Appalachian Trail. But when the Republican was spotted at Atlanta's Hartsfield-Jackson Airport, he decided to come clean about the mysterious hiking trip and quite a bit more. Sanford admitted he was not hiking, but visiting his Argentinian mistress in Buenos Aires. Though his wife, Jenny, said she was open to reconciliation, Sanford was head-over-heels for paramour Maria Belen Chapur. The Sanfords divorced. He became engaged to Belen Chapur in August.
Eliot Spitzer earned a squeaky clean image as the attorney general of New York who took on Wall Street corruption from 1999 to 2006. From there, he moved to the governor's mansion in Albany in 2007. But the Democrat was stopped in his political tracks when his liaisons with high-paid prostitute Ashley Dupre surfaced, and he stepped down as governor in March 2008. He briefly went on to anchor and now hosts "Viewpoint'" on Current TV. He is still married to Silda Wall Spitzer.
In 2009, then Sen. John Ensign, R-Nevada, admitted having an affair with Cindy Hampton, a campaign aide and the wife of his former chief of staff, Doug Hampton. Investigators examined the former senator's efforts to assist the Hampton family by providing a payment of nearly $100,000, arranging lobbying work for Doug Hampton and possibly meeting with him on a lobbying matter in violation of Senate rules. 
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