House Republicans are looking at delaying some federal spending, including money for a prescription drug benefit under Medicare and thousands of highway projects, to offset the cost of rebuilding the Gulf Coast, a leading GOP fiscal conservative said Sunday.

Rep. Mike Pence, R-Ind., said there is a need for dramatic spending cuts in "big-ticket items."

However, Democrats appearing on Sunday news programs questioned how President Bush can trim the budget to pay for Katrina recovery and support tax cuts for the wealthy.

"Where is he going to find roughly half a trillion dollars over the next several years for Iraq and for Katrina?" Sen. Joseph Biden, D-Del., asked on a cable news channel. "I think we're not leveling with the American people."

Raising taxes or not making permanent the president's tax cuts is not the answer now, said Pence, head of the Republican Study Group, the spearhead group for the GOP's most conservative members.

"We simply cannot break the bank of the federal budget," Pence told ABC's Sunday morning news show.

"We simply can't allow a catastrophe of nature to become a catastrophe of debt for our children and grandchildren," he said.

The drug benefit program, set to begin Jan. 1, is expected to cost $40 billion a year. Last month President Bush signed a $286.4 billion highway bill that has been criticized for including about 6,000 projects added by lawmakers to benefit their districts and states.

Setting aside all of those additional highway projects and delaying the drug benefit by a year are expected to be among the proposals House Republicans are preparing for "Operation Offset" this week, Pence said.

"We need to rebuild," he said. "We can find the cuts in Washington, D.C., to do that, I really believe that."

Sen. David Vitter (search), R-La., said tax increases will not be a part of the recovery plan he intends to offer this week. Although cuts in spending and delays in spending already approved will not be in his proposal, Vitter said he is open to considering such actions.

Vitter said people should not take on faith that Republicans will make cuts in light of the high spending during the Bush administration.

"We haven't been disciplined enough over the last 10 years. We need to do that, and we needed to do that before Katrina. We still need to do that over the medium and long term," Vitter said.

Sen. Lindsey Graham, R-S.C., said an across-the-board cut in spending, excluding defense spending, would be appropriate. He suggested lawmakers consider delaying the drug benefit and review the highway and energy bills passed this summer. The energy bill totaled $12.3 billion over 10 years.

"We're failing when it comes to controlling spending," Graham told "FOX News Sunday."

"The idea that this government of $2.4 trillion is efficiently being spent I disagree with," he said.

Former President Clinton said that Democrats should oppose policies that result in the government borrowing more money from other countries to pay for the costs of wars in Iraq and Afghanistan, rebuilding the Gulf Coast and providing tax cuts to the wealthiest.

He said Democrats should make those policies an issue in next year's congressional elections.

"We depend on Japan, China, the United Kingdom, Saudi Arabia and Korea primarily to basically loan us money every day of the year," Clinton said. "I don't think it makes any sense. I think it's wrong."