Washington (CNN) A sizeable bloc of House Republicans are vowing to defeat the GOP budget that was unveiled on Tuesday, arguing it shortchanges defense programs at a time that multiple national security threats around the world means Pentagon spending should be boosted.

"As a Republican I do not want our budget to go down. But as a veteran and somebody who has served in the Army I am not going to be part of something that I believe that makes our country weaker," Florida GOP Rep. Tom Rooney told reporters Tuesday.

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Failure to pass a budget won't trigger any crisis -- budget resolutions are nonbinding and essentially symbolic documents. They do set spending levels for various government agencies and outline the party's priorities for reforming entitlement programs and the tax code, but they lack the force of law.

But if House Speaker John Boehner can't cobble together enough votes from his own members for a budget, he will add another embarrassing setback to a pile of failed efforts this year. Boehner and Senate Majority Leader Mitch McConnell pledged that total GOP control of Congress meant they would prove their party can govern and showcasing a unified budget is key to that pledge.

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