ST. PETERSBURG, Fla. — Democratic presidential candidate Barack Obama said yesterday he would be willing to support limited additional offshore oil drilling if that's what it takes to enact a comprehensive policy to foster fuel-efficient autos and develop alternate energy sources.

Shifting from his previous opposition to expanded offshore drilling, the Illinois senator told a Florida newspaper he could get behind a compromise with Republicans and oil companies to prevent gridlock over energy.

Republican rival John McCain, who earlier dropped his opposition to offshore drilling, has been criticizing Obama on the stump and in broadcast ads for clinging to his opposition as gasoline prices topped $4 a gallon. Polls indicate these attacks have helped McCain gain ground on Obama.

"My interest is in making sure we've got the kind of comprehensive energy policy that can bring down gas prices," Obama said in an interview with The Palm Beach Post.

"If, in order to get that passed, we have to compromise in terms of a careful, well thought-out drilling strategy that was carefully circumscribed to avoid significant environmental damage — I don't want to be so rigid that we can't get something done."

Asked about Obama's comment, McCain said, "We need oil drilling and we need it now offshore. He has consistently opposed it. He has opposed nuclear power. He has opposed reprocessing. He has opposed storage." The GOP candidate said Obama doesn't have a plan equal to the nation's energy challenges.

In Congress, both parties have fought bitterly over energy policy for weeks, with Republicans pressing for more domestic oil drilling and Democrats railing about oil company profits. Despite hundreds of hours of House and Senate floor debate, lawmakers will leave Washington for their five-week summer hiatus this week with an empty tank.

"The Republicans and the oil companies have been really beating the drums on drilling," Obama said in the Post interview. "And so we don't want gridlock. We want to get something done."

Later, Obama issued a written statement warmly welcoming a proposal sent to Senate leaders yesterday by 10 senators — five from each party. Their proposal seeks to break the impasse over offshore oil development and is expected to be examined more closely in September after Congress returns from its summer recess.

The so-called Gang of 10 plan would lift drilling bans in the eastern Gulf of Mexico, but retain an environmental buffer zone extending 50 miles off Florida's beaches and in the South Atlantic off Virginia, the Carolinas and Georgia, but only if a state agrees to the oil and gas development along its coast. The states would share in revenues from oil and gas development.

Drilling bans along the Pacific coast and the Northeast would remain in place under this compromise.

The plan also includes energy initiatives Obama has endorsed, such as a commitment to renewable energy sources and repealing tax breaks for oil companies.

Earlier in the day, Obama pushed for a windfall profits tax to fund $1,000 emergency rebate checks for consumers besieged by high energy costs, a counter to McCain's call for more offshore drilling.