By The Associated Press

Former President Bill Clinton is set to appear at a rally in Tempe for Democratic U.S. Senate candidate Richard Carmona.

Carmona's campaign says Clinton will appear at a rally Wednesday evening at Arizona State University to kick off early voting in the state. Voters can begin casting ballots on Thursday.

Carmona is facing Republican Rep. Jeff Flake in the election to replace the retiring Sen. Jon Kyl, also a Republican.

The rally is free to the public but online registration at www.carmonaforarizona.com is required to get a ticket.

The rally will be held on ASU's Sun Devil Performance Lawn.