GOP state Representative David Floyd declined an appointment to a special committee to investigate Republican Gov. Matt Bevin.
Floyd was one of two Republicans placed on the committee by Kentucky House Speaker Greg Stumbo, a Democrat.
The committee is assigned to look into whether Bevin broke the law when he tried to convince some Democratic lawmakers to switch parties.
In a letter to Stumbo, Floyd said he must decline the appointment because of "pressing family concerns."
Republican leaders have denounced Stumbo's committee as a political farce.
Earlier this week, Floyd released a voicemail message from Stumbo saying he believed the allegations against Bevin are "probably not as bad as maybe it was portrayed." Stumbo said Bevin's actions raise "serious questions" and has asked for a report by January.
