CASPER, Wyo. (AP) - Former U.S. Sen. Alan Simpson is starring in a same-sex marriage commercial in Wyoming and other western states.

Simpson says as a Republican he believes one of the party's core values is the right to be left alone. He says whether people are gay or lesbian or straight, if they love someone and they want to marry, they should marry.

According to the Casper Star-Tribune ( ), Simpson wants to send a message that western values include same-sex marriage.

The ad, paid for by New York-based Freedom to Marry, will play on local television in Wyoming, Colorado, Utah and national cable networks.