Former President Bill Clinton will focus his comments in Wisconsin on Friday on the getting Democrats out to vote early starting Monday.
President Barack Obama's campaign said that would be the focus of Clinton's speech during a campaign stop Friday night in Green Bay.
Earlier in the day, first lady Michelle Obama plans to make pitches for early voting in Racine and Wausau.
Polls show a tight race in Wisconsin between Obama and Republican Mitt Romney.
Wisconsin has 10 electoral votes. The state has not gone for a Republican presidential candidate since Ronald Reagan in 1984.
However, Democrats won in 2000 and 2004 by less than half a percentage point each time.