Rep. Mo Brooks chided President Trump for endorsing appointed Sen. Luther Strange, his main opponent in the upcoming special Senate election in Alabama.

The primary is Tuesday, and Brooks has been struggling in a contest versus Strange and the former chief justice of the Alabama Supreme Court, Roy Moore. The top two vote getters will advance to a run-off if the winner doesn’t clear 50 percent. The race will determine who serves the remainder of Republican Jeff Sessions’ term. Sessions left the seat vacant when he retired to become Trump’s attorney general.