John Rich is trying to convince voters that not all celebrities are liberals. An outspoken Republican, Rich told a Florida audience last week that he believes the Man in Black would be on his political side.

"Somebody's got to walk the line in the country. They've got to walk it unapologetically," Rich told the crowd before breaking into a cover of Cash's 'Walk the Line.' "And I'm sure Johnny Cash would have been a John McCain supporter if he was still around."

But the Washington Post reports that Cash was an outspoken supporter of Democrat Jimmy Carter. Cash was also known to support many Democratic causes.

Additionally, Rich's duo partner, Big Kenny, has endorsed and contributed money to Democratic presidential nominee Barack Obama's campaign.

Rich has also changed his own tune, as he formerly endorsed Tennessee Senator Fred Thompson for the GOP nomination this year. He called Thompson the "only true conservative" in the 2008 Republican primary. But after Thompson dropped out of the race, Rich joined the McCain camp, even writing a song, 'Raisin' McCain,' for the Arizona Senator's campaign.

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