Complex sentence: In 2014, he ran for the Democratic nomination for North Carolina's 2nd congressional district in the United States House of Representatives, his main opponent was former "American Idol" contestant and season 2 runner-up Clay Aiken.
Split into simpler sentences: In 2014, he ran for the Democratic nomination for North Carolina's 2nd congressional district in the United States House of Representatives. His main opponent was former "American Idol" contestant and season 2 runner-up Clay Aiken.