Americans For Prosperity Action, the powerful conservative group supporting Nikki Haley in the Republican presidential primary, will no longer spend money on behalf of her campaign.

In an email to staff obtained by POLITICO, Americans For Prosperity CEO Emily Seidel said Sunday that the group’s political arm, AFP Action, had to “take stock” of its spending priorities after Haley’s loss in the South Carolina primary. The Koch-aligned group, Seidel said, will now focus its efforts on competitive Senate and House races.

“She has made it clear that she will continue to fight and we wholeheartedly support her in this effort,” Seidel wrote of Haley. “But given the challenges in the primary states ahead, we don’t believe any outside group can make a material difference to widen her path to victory.”