Missouri’s Republican attorney general has brought the state into an effort by GOP officials across the nation to reverse President Donald Trump’s election loss.

Attorney General Eric Schmitt announced Wednesday that Missouri has joined more than 15 other states in asking the U.S. Supreme Court to hear a case filed by Trump ally and Texas Attorney General Ken Paxton attacking election procedures in the battleground states of Georgia, Michigan, Pennsylvania and Wisconsin.

Democrat Joe Biden prevailed in all four, giving him the electoral votes necessary to win the November election. Trump has repeatedly made unsupported claims of election fraud in battleground states.