Even before the Indiana and North Carolina results were in, Barack Obama and Hillary Rodham Clinton were looking ahead to the five states and one territory yet to vote in the protracted nomination contest. Putting his fundraising advantage to work (Clinton announced today that she has lent her campaign $6.4 million over the past month, while Obama continues to report strong numbers), the Illinois senator beat his rival to the airwaves in all six contests, going up with TV spots in West Virginia, Oregon, Kentucky, Puerto Rico, South Dakota and Montana by April 26.

West Virginia is the next to vote, on May 13, and Clinton is considered the favorite. But Obama is focusing on economic issues in hopes of attracting some of the blue-collar voters that make up a huge percentage of the state's electorate. A topic that dominated the debate in Indiana is spilling over into West Virginia -- what to do about gas prices. In "Nothing's Changed," a spot that debuted in Pennsylvania, Obama goes after oil companies for gouging customers at the pump and promises to change the system if elected.

Oregon, set to vote on May 20 along with Kentucky, is thought to be an Obama stronghold. Indicating his intention to try to run up the score in the state, Obama went on air with TV and radio ads there on April 15. One radio ad aimed directly at young people portrays the Illinois senator as the candidate who "gets" what America's youth cares about. "Join" (subscription), which debuted in several Super Tuesday states, features upbeat music and a jubilant message from the candidate. "The world as it is is not the world as it has to be," he proclaims, as "We can change the world" appears on screen. In "Enough " (subscription), Obama promises to reward companies who keep jobs in America rather than shipping them overseas. And "Turn It Off" (subscription), which debuted in North Carolina, touts Obama's plans for education reform, but also encourages adults to be more engaged in their children's lives.

Voters in Kentucky, meanwhile, are seeing an ad that previously ran in Pennsylvania: "Toughest," which discusses Obama's record of fighting special interests in Washington.

In South Dakota, Obama is running "Turn It Off" and "Mother" (subscription), an ad that debuted in Iowa last September, which tells the story of his mother's death from cancer in order to convey to voters that he understands the importance of health care reform. In Montana, meanwhile, "Join" is on the air, along with "Carry" (subscription), which touts Obama's efforts at bipartisanship in the Illinois legislature, and "Need" (subscription), in which he criticizes corporate salaries and promises to "return some balance to our tax code."