Democratic presidential candidate Barack Obama said Friday 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.

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.

Later, Obama issued a written statement warmly welcoming a proposal sent to Senate leaders Friday 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.

The plan also includes energy initiatives Obama has endorsed. “It would repeal tax breaks for oil companies so that we can invest billions in fuel-efficient cars, help our automakers re-tool, and make a genuine commitment to renewable sources of energy like wind power, solar power, and the next generation of clean, affordable biofuels,” Obama noted.

Obama is not making many friends within the environmental movement.  He is compromising or is it flip-flopping?