Ms. Tanden does have the backing of the U.S. Chamber of Commerce, but conservative political action groups and liberal activists have mobilized against her nomination, suggesting that she will be hard pressed to find support from other Republicans.
“Neera Tanden is an architect of Obamacare, cheerleader for the Green New Deal and advocate for socialism in America,” David M. McIntosh, the president of the Club for Growth, said this month. “Any senator that cares about working with O.M.B. to grow the economy — not destroy it — should vehemently oppose this nomination.”
Republicans were not the only ones who confronted Ms. Tanden. Senator Bernie Sanders of Vermont, the chairman of the budget committee, asked her to “reflect” on some of the things that she had said about him and his progressive allies over the years.
“There were vicious attacks made against progressives, people who I have worked with, me personally,” said Mr. Sanders, who still has not said publicly whether he will vote for Ms. Tanden.
Progressives sought to further derail the nomination on Monday.
The activist group RootsAction coordinated a Twitter “storm,” with images and hashtags to encourage senators, including Mr. Sanders, to reject Ms. Tanden. The group pointed to the donations from foreign governments that her think tank, the Center for American Progress, received under her watch and her previous comments supporting cuts to social safety net programs.
“Tanden has become known as one of the most prominent anti-progressive voices of the neoliberal establishment,” the group said in a background document.