Club for Growth, the limited government, anti-tax group that most often targets incumbent Democrats, is now taking on Utah Sen. Robert Bennett (R), who co-sponsored a health care bill with Sen. Ron Wyden (D-Ore.). The third-term senator is up for re-election next year, and a number of conservative Republicans are lining up to challenge him in the primary.

"We believe it's important for Senator Bennett's constituents to know that he's pushing for massive tax increases and government-run healthcare," said CfG president Chris Chocola, a former Indiana congressman. "Empowering bureaucrats at the expense of patients and doctors is the wrong medicine for our health system. It's time for Senator Bennett to scrap his costly government takeover and focus on patient-centered solutions that ensure more Americans have access to real, quality care."

Chocola is also attempting to pressure Bennett from within his own state party. He is sending a letter to the more than 3,000 delegates to next year's state party convention, requesting they "call on" Bennett to drop his bill -- which Chocola says is "in some respects...worse" than the Democrats' plan.

The TV ad in Utah is part of a nationwide $1.2 million ad buy, though it's unknown how much is being spent in Utah.