EXCLUSIVE — A group of 12 prominent conservatives, including a former governor, media executives, and a former U.S. attorney general, have issued a letter calling for Nikki Haley to drop out of the race for president.

The former U.N. ambassador is the last remaining GOP opponent in former President Donald Trump‘s quest to win a nonconsecutive second term in the White House. She has vowed to remain in the race and is continuing to raise money, but the group argues she is only damaging her party.