Two days after Donald Trump won in four of five primaries, efforts to knock the frontrunner from his perch limp forward.

But the impact of the money and time spent knocking Trump are coming into question after the real estate mogul surged ahead of Ted Cruz by more than 250 delegates.

Katie Packer, a Republican strategist who founded Our Principles PAC to hinder Trump’s success, said she is evaluating the path forward.

“We’re having conversations with donors, gauging the interest in moving ahead,” Packer told NBC News.

A group of conservatives led by Erick Erickson, editor of Red State, met Thursday and pledged to continue their efforts to prevent Trump from winning the nomination.