The state medical examiner's office says former North Carolina congressional candidate Keith Crisco died from heart problems.

Crisco was in a close battle with former American Idol star Clay Aiken for the second congressional district Democratic spot, when Crisco fell at his home on May 12.

Aiken was named the winner in the Democratic primary.  He won by less than 400 votes.

Keith Crisco was also a former North Carolina Commerce Secretary.