Republican presidential candidate Nikki Haley says it’s not “the end of our story” despite Donald Trump’s easy primary victory in South Carolina, her home state where the onetime governor had long suggested her competitiveness with the former president would show.

Defying calls from South Carolina Republicans to exit the race, Haley traveled Sunday to Michigan, which holds its primary on Tuesday, speaking to a hotel ballroom packed with hundreds of supporters.

In the less than 24 hours following her Saturday night loss to Trump, Haley’s campaign said that she had raised $1 million “from grassroots supporters alone,” a bump they argued “demonstrates Haley’s staying power and her appeal to broad swaths of the American public.”

But with Sunday also came the end of support for Haley’s campaign from Americans for Prosperity, the political arm of the powerful Koch network.

In a memo first reported by Politico and obtained by The Associated Press, AFP Action senior adviser Emily Seidel wrote that, while the group “stands firm behind our endorsement” of Haley, it would “focus our resources where we can make the difference,” redirecting spending toward U.S. Senate and House campaigns and away from Haley’s presidential bid.

“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,” Seidel wrote.

AFP Action had endorsed Haley’s campaign in November, promising to commit its nationwide coalition of activists — and virtually unlimited funds — to helping her defeat Trump, with door knockers fanning out across early-voting states and sending out dozens of mailers on her behalf.

With his win Saturday in the first-in-the South contest, Trump has now swept every primary or caucus on the GOP early-season calendar that awards delegates. His performances have left little maneuvering room for Haley, his former U.N. ambassador.