Funny Moments from the 2008 Campaign Trail

Sen. Hillary Clinton joked about her pantsuits during an appearance on the "Late Show with David Letterman."

Watch Ted Kennedy confuse Barack Obama with Osama bin Laden in this embarrassing video clip.

As former New York Mayor Rudy Giuliani began to answer a difficult question about his position on abortion during a Republican presidential debate, lightning struck from above.

Watch a series of funny campaign ads featuring Democratic presidential candidate Bill Richardson at a job interview for President of the United States.

Hillary Clinton drew laughter at a recent fundraiser when she likened Dick Cheney to Darth Vader. "You can always tell when the Republicans are getting restless, because the Vice President's motorcade pulls into the Capitol, and Darth Vader emerges," Clinton quipped.

With "The Tonight Show" as his backdrop, former Sen. and Law & Order star Fred Thompson officially announced his presidential candidacy, making him the latest in a series of candidates to use a late-night comedy show to launch their campaigns.

Mitt Romney talks about his perfect hair and his perfect chin during an interview with Jay Leno on "The Tonight Show."

Presidential hopeful Barack Obama matched wits with Jon Stewart during an appearance on "The Daily Show," talking about the 2008 campaign narrative and his vision for America.

Sen. John McCain appeared on the "Late Show with David Letterman" to officially pre-announce that he will announce he's running for president.