Updated

As the presidential race narrows in Minnesota, former President Bill Clinton is planning to visit here this week to shore up support for President Barack Obama.

Details of the Tuesday visit are still being worked out.

Clinton will visit the University of Minnesota's McNamara Alumni Center in Minneapolis Tuesday morning and then make a stop at Duluth's Kirby Ballroom at the University of Minnesota Duluth for a noontime event.

The former president's visit is part of a Midwest swing that includes Minnesota, Iowa, Colorado, Ohio, Virginia, New Hampshire and Wisconsin, the Obama campaign said. All year, the six other states have been considered battleground areas in the presidential race.

Minnesota has not been on that swing state list but a Star Tribune Minnesota Poll, published Sunday, shows a newly tight race between Obama and Republican Mitt Romney. The poll found Obama with a 3 percentage point lead over Romney, an advantage that is within the poll's margin of error of plus or minus 3.5 percentage points.

The state may also see a visit from Romney or his running mate Paul Ryan, the Associated Press reported.

The sudden attention comes as both campaigns have started buying advertising time in Minnesota, which had been lacking until last week.

Although Minnesota has given its 10 electoral college votes to the Democratic candidate for president since 1972, those victories were narrow in 2000 and 2004.