07/07/2010 03:47 pm ET Updated May 25, 2011

Andrew Romanoff's 'Casino' Ad To Air In Colorado (VIDEO)

Andrew Romanoff has made his first TV ad buy in the Colorado Senate race, debuting on the air with an ad comparing Washington to a rigged casino.

Playing off his campaign's most consistent theme, Romanoff's ad touts his refusal to accept corporate and PAC money during the Senate campaign.

The campaign declined to disclose the size of the ad buy, calling it comparable to "other statewide buys this cycle."

Most public polls have Romanoff trailing his primary opponent, incumbent Michael Bennet, heading into the August 10 primaries.