National Republicans went on the attack Thursday against Rep. John Spratt (D-S.C.) as the Budget Committee chairman released his fiscal outline.

The National Republican Congressional Committee (NRCC) went up with an ad against Spratt, who's facing a tougher-than-usual reelection challenge.

"American families and small-business owners are making tough budget choices this year," says the ad, which is running on cable throughout Spratt's district. "But Nancy Pelosi’s Budget chairman, John Spratt, is refusing to write a budget for the federal government.

"No federal budget means no long-term plan to cut spending, reduce our debt or create jobs," it continues. "Go to WhereIsThe, sign the petition and ask John Spratt, 'Where is the budget?' "

While House Democrats punted on drafting a formal budget, Spratt unveiled a "budget enforcement resolution" on Thursday morning as a substitute. The proposal includes hefty spending cuts and will be included in a rule on a war supplemental bill, but doesn't get specific about where spending might be cut.

The NRCC's offensive against Spratt is part of a broader election-year effort by Republicans to highlight budgetary and spending issues. Top Republicans have hammered away at Democrats, and they view Spratt's position as chairman of the House Budget Committee as making him especially vulnerable to attack.

Spratt's challenger is Republican Mick Mulvaney.