Colorado Senate candidate Jane Norton (R) is hoping to derail her Republican rival's primary campaign by using a "caught on tape moment" in her new TV ad.

Norton’s 30-second spot features video of Weld County District Attorney Ken Buck pitching for votes because he doesn't "wear high heels."

"I have cowboy boots; they have real bulls--t on them," he said. "And that's Weld County bulls--t."

The video, which has been circulating online, has already generated significant media attention, although versions of it posted on YouTube drew a modest viewership.

That's about to change. The TV ad is airing statewide on broadcast and cable, according to a spokeswoman for Norton. OnMessage Media produced the spot.