ORLANDO, Fla. (CNN) -- The son of Democratic U.S. Sen. Bill Nelson, D-Florida, was arrested early Wednesday on three charges, including a felony, after he pushed an Orlando policeman and resisted the officer's attempts to handcuff him following a street fight, police said.

Nelson was re-elected to a second Senate term Tuesday night.

Charles William Nelson, who will turn 31 on Nov. 17, was charged with battery on a law enforcement officer, a felony; disorderly conduct; and resisting arrest without violence, both misdemeanors. The charges were described in an affidavit by bicycle patrolman William Becton.

Nelson was released on a $12,000 cash bond after being booked about 5 a.m. at the Orange County Jail, said jail spokesman Alan Moore. Until he left, he was held in protective custody because he is the son of a senator, Moore said.