Liberal groups have sought to jam Republican phones lines with protests of President Trump’s nomination of Betsy DeVos as Education secretary.

Credo Action’s vice president and political director, Murshed Zaheed, said its members made 18,000 calls to members of the Senate Health, Education, Labor and Pensions Committee on DeVos, targeting committee Democrats and key Republicans, including Sens. Lisa Murkowski (R-Alaska), Susan Collins (R-Maine) and Rand Paul (R-Ky.).