Washington ? President Barack Obama and Democratic leaders insist they will push ahead with efforts to overhaul health care despite losing undisputed control of the Senate.

They just haven’t decided what it will look like or how they will pass it. In fact, they aren’t explaining much.

A senior Democratic aide said Saturday that House and Senate leaders are considering changes to the Senate bill that could make it acceptable to the House. Under one scenario, Democratic senators would make the agreed-upon fixes using a special budget procedure that requires only 51 votes to overcome Republican delaying tactics.

The House would then pass the Senate bill, sending it to Obama for his signature and allowing the health care remake to become law.

But the aide, who described the discussions on condition of anonymity because of the sensitivity of the issue, said no decisions have been made. The strategy would be politically risky because it would enrage Republicans, and the legislation itself lacks strong public support.

Obama acknowledges running into a “bit of a buzz saw” of opposition. A top Democrat suggests Congress slow down on health care, a sign of eroding political will in the wake of Republican upset in the Massachusetts Senate race Tuesday.

Sen. Chris Dodd, D-Conn., who got health legislation through the Senate’s health committee last year after the death of his friend, Sen. Edward M. Kennedy, said Obama and lawmakers could “maybe take a breather for a month, six weeks.”

Just a week ago, the legislation had appeared near passage after Obama threw himself into marathon negotiations with congressional leaders.

“There are things that have to get done. This is our best chance to do it. We can’t keep on putting this off,” Obama said Friday at a town hall meeting in Elyria, Ohio.

“I am not going to walk away just because it’s hard,” the president said.

Obama seemed to pull back from a suggestion he made Wednesday that lawmakers unite behind the elements of the legislation everyone can agree on. Obama said scaling back health care presented problems because some of the popular ideas, such as banning denial of coverage to people with medical problems, can’t be done unless most Americans are insured.

“A lot of these insurance reforms are connected to some other things we have to do to make sure that everybody has some access to coverage,” he said. For example, insurers wouldn’t be able to end the practice of denying coverage to people with health conditions unless more people were covered. Otherwise people could wait until they got sick to buy insurance and premiums could skyrocket.