President Donald Trump on Tuesday endorsed Texas Attorney General Ken Paxton in his primary challenge to Sen. John Cornyn, dealing a massive blow to the incumbent with major implications in the fight for the Senate majority.

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.