Former President Bill Clinton and Mike Michaud shake hands before Clinton speaks at Tuesday's campaign rally for Michaud at the Portland Expo.

People line up outside the Portland Expo on Tuesday evening for a campaign rally for Democratic gubernatorial candidate Mike Michaud featuring former President Bill Clinton.

Mike Michaud laughs while doing audio checks for Tuesday night's campaign rally at the Portland Expo featuring former President Bill Clinton.

Rosa Van Wie prepares wristbands for attendees of Tuesday's rally for Mike Michaud, the Democratic candidate for governor.

Bill Clinton laughs while Mike Michaud speaks during Tuesday night's rally at the Portland Expo.

With Democratic U.S. Rep. Mike Michaud behind him, former President Bill Clinton speaks at a rally Tuesday night at the Portland Expo to support Michaud's run for governor.

Rep. Mike Michaud, D-Maine, left, joined by Former President Bill Clinton, right, speaks Tuesday, in Portland, at a campaign rally for Michaud's campaign for governor. The Associated Press

Former President Bill Clinton, joined by Rep. Mike Michaud, D-Maine, right, speaks, Tuesday, in Portland, at a campaign rally for Michaud's campaign for governor. The Associated Press

Former President Bill Clinton, right, hugs Rep. Mike Michaud, D-Maine, left, before he speaks, Tuesday, in Portland, at a campaign rally for Michaud's campaign for governor. The Associated Press

Former President Bill Clinton, joined by Rep. Mike Michaud, D-Maine, right, speaks Tuesday, in Portland, at a campaign rally for Michaud's campaign for governor. The Associated Press