TOPEKA, Kan. (AP) — A freshman Kansas congressman has changed his voter registration for the second time in six weeks after coming under investigation for potentially violating state election laws for previously listing a UPS Inc. store as his residence.

Republican Rep. Steve Watkins listed a Topeka apartment as his residential address on a registration form filed Jan. 17, the Kansas secretary of state's office confirmed Friday. Watkins had listed a different address in the same complex, the one for its office, when he previously changed his registration Dec. 6.

Questions about Watkins' voter...