Ron Paul begins a three-day campaign swing today in his home state of Texas, armed with a new TV ad that cracks a whip at his GOP presidential rivals.

The whip-cracking sound comes at the end of the spot that assails Paul's opponents as "a big-spending, debt-ceiling-raising fiscal liberal" (Rick Santorum), "the moon colony guy" (Newt Gingrich) and "a moderate from Massachusetts" (Mitt Romney).

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After briefly showing an Etch A Sketch to denote that the Texas congressman "isn't playing games," the ad proclaims Paul as a "big bold Texan" with a plan to cut five Cabinet departments and $1 trillion from the federal budget.

The Texas primary isn't until May 29 and Paul is bringing up the rear when it comes to delegates needed for the Republican nomination. But he attracts enthusiastic crowds on the campaign trail, largely populated by college students and those who believe in his anti-war, small government message.

Paul, who has said he is not seeking re-election to his congressional seat, holds a town hall meeting tonight at Texas A & M University in College Station, before heading to Fort Worth tomorrow and San Antonio on Thursday.

Paul has also launched an "in it to win it" money bomb, with a goal of raising $2 million on April 15. The Houston Chronicle reports Paul will also hold fundraisers in Dallas and San Antonio.