Pres. Obama kicks off week-long campaign swing with stop in Milwaukee

WASHINGTON (AP) — President Barack Obama is kicking off a week-long, six-state campaign spree with a visit to Wisconsin.

Obama will attend a rally at a Milwaukee high school Tuesday for Mary Burke. She's the Democrat trying to oust Republican Gov. Scott Walker. Defeating Walker, a potential 2016 presidential contender, would be a major coup for Democrats.

The president has been a rare sight on the campaign trail this year, where his low approval ratings make him a potential liability for his party. But in states like Wisconsin, Democrats are hoping high turnout among die-hard Obama supporters will put them over the top in hard-fought races for governor.

Polls show the Wisconsin race is deadlocked between Walker and Burke, with very few voters undecided. Obama won Wisconsin in 2008 and 2012.