Moderate Republicans have come under attack in primaries across the country this year, but the split in the GOP is perhaps older and sharper in Kansas — and it comes to a head Tuesday.
"I think the lines have been drawn in the sand. Bridges have been burned. Everybody is all-in this election," says Jim Denning, one of the conservative candidates for the state's Senate.
The Republican statehouse primary is a savage fight fueled by money from the Koch brothers and labor unions, with big consequences for the citizens of Kansas.