President Trump has endorsed Texas Attorney General Ken Paxton over incumbent Sen. John Cornyn in the Texas GOP runoff for U.S. Senate, one week before voting ends in the contentious and expensive primary.

Trump said Cornyn was “very late” in backing him for the Republican presidential nomination and during the presidency itself.

President Donald Trump has endorsed Texas Attorney General Ken Paxton, supercharging his effort to oust incumbent Sen. John Cornyn in a Republican primary runoff.