WASHINGTON — Rep. Jim Matheson, D-Utah, may smile the most at new campaign finance disclosures of his two GOP challengers, John Swallow and Tim Bridgewater.

Forms show they are spending big money against each other — and both say they may drain available funds dry if that's needed to win their primary. As of two months ago, Matheson had amassed $800,000 in the bank to give himself a huge financial advantage against whoever wins.

Deseret Morning News graphic Pre-primary campaign funds Story continues below Requires Adobe Acrobat.

Meanwhile, in Utah's 3rd District House race, Rep. Chris Cannon, R-Utah, has belatedly shifted his fund-raising and campaigning into full gear — raising and spending four times more than rival Matt Throckmorton in the past two months. Cannon had done relatively little fund-raising until Throckmorton surprisingly forced him into a primary.

That is revealed in forms candidates were required to file Thursday with the Federal Election Commission, 12 days before their June 22 primary. Forms cover the period from April 19 to June 2, and candidates also filed some notices of large donations since then.

Forms show that Swallow has spent $523,746 so far — but only $26,615 of it in the reporting period. His total is more than twice as much as the $209,102 Bridgewater spent (but he has spent a heftier $97,446 since April 19). Bridgewater won a majority of delegate votes at the GOP convention but not enough to avoid a primary.

Swallow reported $220,280 cash on hand at the end of the period, compared to $151,811 for Bridgewater. Swallow also had more unpaid bills — $36,999 — compared to $17,542 for Bridgewater.

Both said they are willing to spend all available funds, if necessary, to advance.