Texas Rep. Ron Paul has started running the first TV ads in Washington state in advance of the state's Saturday caucuses.

The Paul campaign announced that the ad, called "Three of a Kind," was to start running in the state on Wednesday on the Fox News Channel. The will run for three days.

The 60-second ad criticizes Paul's three opponents in the crowded Republican presidential primary. He refers to former U.S. House Speaker Newt Gingrich as a "serial hypocrite," former Pennsylvania Sen. Rick Santorum as a "counterfeit conservative" and former Massachusetts Gov. Mitt Romney as a "flip-flopper."

Paul is currently last in the delegate race, with just 19 after Tuesday's primaries in Arizona and Michigan, according to a count by The Associated Press. It takes 1,144 to win the nomination at the convention in Tampa this summer.