[cnn-photo-caption image= http://i.l.cnn.net/cnn/2008/images/02/12/art.clintonad.cnn.jpg caption="Clinton is hitting Wisconsin airwaves."](CNN) - Hillary Clinton's presidential campaign is launching its first television ad in Wisconsin Tuesday, a state that may prove crucial to the New York senator should she get swept in Tuesday's Potomac Primary.
The 30-second spot, called "Obligation," highlights Clinton's healthcare plan, with the announcer saying Clinton is "the only candidate for president with a plan to provide health care for every American."
The ad does not mention rival Barack Obama by name, though Clinton often criticizes the Illinois senator for not adopting a healthcare plan that mandates coverage for all Americans.
Following primaries in Maryland, the District of Columbia, and Virginia Tuesday, the next battlefront will be Wisconsin, set to vote February 19. The state has a large working-class population – a voting bloc that has leaned toward Clinton in previous contests. It also has a large student population and a sizeable number of Independents - groups that have favored Obama in earlier primaries.
But in a sign the New York Democrat is already looking ahead to the March 4 Ohio and Texas primaries. She's headed to El Paso, Texas Tuesday night and plans to spend all day Wednesday stumping in the delegate-rich state.
Obama, meanwhile, is heading to Madison, Wisconsin Tuesday night. His campaign began airing a television ad there that touts his own healthcare plan earlier this week.
- CNN Ticker Producer Alexander Mooney