(TOPEKA, Kan.) — Kansas Republicans on Tuesday nominated Rep. Roger Marshall for the Senate over polarizing conservative Kris Kobach, heeding the party establishment’s advice as it tries to keep a normally safe seat out of play in what could be a difficult year for the GOP. Marshall prevailed comfortably in a crowded primary field with the backing of major farm, business and anti-abortion groups but without a pre-election endorsement from President Donald Trump sought by Senate Majority Mitch McConnell and others for the two-term congressman for western and central Kansas.