The North Carolina entrepreneur who was locked in a too-close-to-call Democratic Party primary with former

American Idol

singer Clay Aiken died Monday, said the president of the textile company he founded.

Keith Crisco, 71, died from "some type of fall" at his home, according to Robert Lawson, president of AEC Narrow Fabrics.

Crisco's sons, who work for the company, told Lawson about their father's death.

It wasn't immediately clear what will happen in the primary. Fewer than 400 votes separated Crisco and Aiken, who was leading, after the contest last Tuesday to face GOP incumbent Renee Ellmers in November in the GOP-leaning Second Congressional District. - AP