WASHINGTON -- Mounting scandals at the Internal Revenue Service are jeopardizing critical funding for the agency as it gears up to play a big role in President Barack Obama's health care law.Obama sought a significant budget increase for the IRS for next year, when the agency will start doling out subsidies to help people buy health insurance on state-based exchanges. Congressional Republicans, however, see management problems at the IRS as an opportunity to limit the agency's funding just as it is trying to put in place the massive new law."The bottom line here is that the IRS can barely manage what it already has to do, and that's a generous characterization given the targeting of conservative groups," said Sen. Orrin Hatch of Utah, the top Republican on the Senate Finance Committee, which oversees the IRS."Adding Obamacare under the IRS, that can only be described as a looming disaster. And now the Democrats are saying we need to give the IRS more money. I'm not sure I'm willing to do that."