Open mike, insert foot?

One political interview rarely has a significant impact on a politician's image or electability, but there are exceptions. Just ask Rep. Michele Bachmann. Her comments last month on "Hardball With Chris Matthews" that Barack Obama might have anti-American views and that all members of Congress should have their patriotism investigated triggered a sharp spike in financial contributions for her main opponent, Elwyn Tinklenberg. It also gave many Bachmann supporters a chance to bond over their disdain for MSNBC, a news organization that leans left.

In either case, the interview could be a game-changer. Here are 10 that already qualify:

Jacqueline Kennedy, "Tour of the White House" (Feb. 14, 1962): No, the First Lady wasn't running for office, but her behind-the-scenes tour, which aired on three networks, contributed mightily to the Camelot image and changed the relationship between TV and politics almost as much as her husband's debate against Richard Nixon. The one-hour show, in which Charles Collingswood asked questions about her White House renovation and sense of style, was the first prime-time special designed to court female viewers.

Richard Nixon, "Frost on America" (May 1977): Nixon tried to rehabilitate his tattered image with a series of sit-downs with the popular British personality. In the most revealing segment, Nixon talked about how he had lost purpose in life and opined on how the rich are the unhappiest people in the world. The exchange was so memorable that it was made into the hit play "Frost/Nixon" and a movie version, directed by Ron Howard, hits theaters in December.

Ted Kennedy, "Teddy" (Nov. 4, 1979): The third Kennedy to take a run at the White House had a decent chance to upset incumbent Jimmy Carter -- until he flunked a job interview. In this prime-time documentary, newsman Roger Mudd lobbed the softball question: "Why do you want to be president?" The senator took an 11-second pause -- infinity in TV time -- then slipped into a rambling "Why I Love America" essay that could have been written by a third-grader. So much for the Kennedy charm.

George H.W. Bush, "CBS Evening News" (Jan. 25, 1988): Bush changed his image from a featherweight to a heavyweight in a feisty, unedited bout against Dan Rather. Bush, the veep at the time, appeared live at the end of a five-minute piece on arms-for-hostages and immediately accused Rather of setting him up. Then it got ugly. Bush got off a punch about Rather huffing off the set during a tennis delay and the usually unflappable anchor never recovered. By the end, when Rather rudely cut off the Republican candidate, the results were clear: Bush in a knockout.

Michael Dukakis, "Nightline" (Oct. 25, 1988): To be fair, the Democratic candidate was a 10-1 shot just two weeks before the election. After sitting down with Ted Koppel, his odds were closer to 100-1. "With all due respect," Koppel said at one point, "let me suggest to you I still don't think you get it." He certainly didn't get the presidency.

Ross Perot, "Larry King Live" (Feb. 20, 1992): Perot was a little-known Texas jillionaire until King presented him as a political messiah. During this visit, Perot said he would run for president if Americans would register him in 50 states. "I want to see some sweat," Perot said. "I want you in the ring." The challenge led to one of the most successful runs by an independent in modern history.

Kathleen Gingrich, "Eye to Eye With Connie Chung" (Jan. 5, 1995): Newt Gingrich and Chung should have been on top of the world in early 1995. Gingrich had just become Speaker of the House and Chung had nabbed an anchor chair alongside Dan Rather. But Chung's reign would be short-lived, in part because of her disastrous interview with Newt's mother, in which she asked the 68-year-old woman for her son's opinion on Hillary Clinton. "Why don't you just whisper it to me, just between you and me," Chung said. The profane response was less offensive than Chung's tactics. Five months later, Rather was working alone.

Arnold Schwarzenegger, "The Tonight Show With Jay Leno" (Aug. 6, 2003) In a move that rivaled the twist in "Total Recall," the popular actor stunned the prognosticators by announcing a run for governor of California. "It's the most difficult decision I've made in my entire life, except the one I made in 1978 when I decided to get a bikini wax," he said, displaying the kind of self-deprecating wit that helped him beat such stellar rivals as porn star Mary Carey and Gary Coleman.

Stephane Dion, CTV interview (Oct. 9, 2008): Americans don't have exclusive rights to political gaffes. Many believe that the recent race for Canada's prime minister came down to Dion's awkward performance in a major interview. The Liberal Party candidate was asked what he would do about the economy if he were prime minister right now. Dion reacted like he had just been asked to explain game theory. He asked for a do-over three times and even needed help from an aide. Soon after, he lost. No surprise that on Election Night, he refused to talk to CTV.