Arnold Schwarzenegger
Schwarzenegger announces his candidacy for governor.
Arnold Schwarzenegger is just as much a politician as he is a movie star. But the announcement that he was running for governor of California on The Tonight Show with Jay Leno blew people away.
Craig Ferguson
Craig Ferguson, who is originally from Scotland, took the United States citizenship test on his show "The Late Late Show with Craig Ferguson" in 2008.
He answered questions about American history, government, and culture, while injecting his trademark humor and wit. The segment was well-received and even became a popular clip on YouTube.
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