PROVO — With a week left in their bid to unseat six-term Utah Congressman Chris Cannon, Jason Chaffetz, David Leavitt and Joe Ferguson threw some haymakers at the incumbent during a debate Saturday in Provo.

Chaffetz even threw a couple of roundhouse rights at Sen. Orrin Hatch and Gov. Jon Huntsman Jr., to the delight of most in the audience of more than 100 delegates to next weekend's state Republican convention.

Chaffetz, Leavitt and Ferguson said Utah and the state's 3rd Congressional District do get some benefit from Cannon's seniority in Congress, but all three said he'd made enough missteps that he should be replaced.

"Seniority does not necessarily equal influence," said Chaffetz, who then criticized Hatch for being unable to move Congress toward passing an immigration reform bill this year. Chaffetz said he was "terribly frustrated" when Hatch told the state Legislature in February that reform would have to wait another year. Hatch is in his 32nd year in the U.S. Senate.

"Why are we sending you back for Year 34 if you can't get this issue moving?" Chaffetz said.

Chaffetz also chided Huntsman, his old boss, for embracing global warming. Chaffetz was Huntsman's campaign manager and first chief of staff.