John McCain raised eyebrows with his Paris Hilton/Britney Spears campaign ad comparing Barack Obama to a celebrity. Now, country music star John Rich has joined the political fray and is leading the charge with an all-new anthem inspired by the republican presidential candidate.

"I'm a John McCain supporter, obviously," says Rich. "Down in Texas, where I'm from, if you're really stirring up a ruckus they say, 'Let's go raise some Cain.'"

Only ET's cameras caught Rich shooting his music video for the song, which he says he was inspired to write by the Arizona senator's five-and-a-half years as a prisoner of war in Vietnam.

"At the end of the day, go vote, go stand in line, wait your turn, pull the lever, punch the button and make sure your voice is counted on either side of the ticket -- that's one of our greatest freedoms," proclaims Rich.