Although Republican John McCain trails in presidential polling, he has a potential game-changer in his matchup with Democrat Barack Obama, on probably the biggest issue of the campaign: energy. With the national price average for gasoline hovering around $4 a gallon, more Americans agree with McCain than Obama on going after available U.S. sources of oil and natural gas. Various polls place public support for tapping known oil reserves offshore and in Alaska at near 60 percent. A recent Wall Street Journal poll showed energy — including gasoline prices and utility costs — is the economic issue Americans say most affects them. Certainly, McCain has seen the numbers and has aired a national television ad laying high gas prices at Obama's feet. Campaign hyperbole aside, it's absolutely true Obama's party, which controls Congress, is blocking all attempts to even consider allowing new oil and gas exploration in protected areas. Last week, Speaker Nancy Pelosi refused to let the House vote on new drilling. In the Senate, business slowed to a creep as Democratic leaders labored to keep Republicans from attaching drilling amendments to various pieces of legislation. What an impression: The party (and candidate) of hope and change would leave Americans hoping the current energy situation will change. By contrast, Republicans and their presidential candidate would use American sources of energy for America, lessening the country's vulnerability to foreign suppliers and price shocks. Energy is McCain's chance to turn the economy into an issue that works for him. Obama is a talented speaker, evidenced by last week's address that cemented his rock-star status in Germany. But on energy, he and his party are at odds with the majority in this country. It's a point McCain should make at every campaign stop, to people who actually have a vote in November.