Obama, Clinton look to West Virginia

In a sign of his new focus on McCain, Obama is beginning to campaign in states without upcoming primaries. He said he would soon visit Michigan and Florida, two battleground states whose Democratic primaries were essentially nullified by party disputes, and Tuesday he is slated to visit Missouri for a campaign event focusing on economic issues.

McCain, meanwhile, reached out to independents and green-minded social conservatives, arguing that global warming is undeniable and the U.S. must take steps to bring it under control.

In remarks prepared for delivery Monday in Portland, Oregon, the presidential contender says expanded nuclear power must be considered to reduce carbon-fuel emissions. He also sets a goal that by 2050, the country will reduce carbon emissions to a level 60 percent below that emitted in 1990.

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Associated Press writers Matt Apuzzo in Huntington, West Virginia, and Charles Babington in Bend, Oregon, contributed to this report.