Sen. Lamar Alexander wants to make clear that all of Tennessee’s GOP establishment is behind his 2014 bid for re-election, sending a beacon flare to any ambitious Republicans who might consider taking him on in a primary.

Alexander will announce on Saturday that Rep. John J. Duncan Jr., R-Tenn., will chair his re-election campaign with Tennessee Republican Reps. Marsha Blackburn, Phil Roe, Diane Black, Stephen Fincher and Chuck Fleischmann, along with Gov. Bill Haslam, Sen. Bob Corker, Lt. Gov. Ron Ramsey and Tennessee  House Speaker Beth Harwell serving as honorary co-chairmen.

If Alexander faces any threat this cycle, it would be from his right. There is no indication there are Republicans preparing to run, unlike in other states where GOP senators are vulnerable in primaries like Georgia and South Carolina. And his announcement means any challenger would be running against the totality of the Tennessee party establishment.

Notably, the only Tennessee Republican member absent from Alexander’s announcement today: embattled Rep. Scott DesJarlais.

Roll Call rates the Tennessee Senate races as Safe Republican.