The Republican primary for attorney general may be among the most interesting races in the nation in 2016.

It pits state Sen.Kurt Schaefer against law professorJosh Hawley. DemocratsTeresa Hensley andJake Zimmerman are waiting on the other side.

Hawley and Schaefer have been hammering each other for some time. Tuesday, Hawley picked up the endorsement ofCitizens United’s political action committee.

“Josh Hawley is a principled constitutional conservative,”David Bossie of Citizens United said in a statement.

TheMissouri State Troopers Associationendorsed Schaefer this week.