The four main Republican candidates for Kansas governor held their final scheduled debate before the August 7 primary election. The Topeka Capital-Journal reports that Governor Jeff Colyer unleashed a torrent of criticism against Kris Kobach, his main rival for the Republican nomination. Colyer criticized Kobach for wasting taxpayers' money in recent proof-of-citizenship lawsuits. All four candidates touted their conservative credentials and aligned themselves with President Donald Trump. A fifth candidate, former state senator Jim Barnett, attended the event but was not allowed on stage. Barnett refused to sign a pledge that restricts debates to party-sanctioned events.