Sen. Elizabeth Warren on Monday blasted the process Republicans are using to get Betsy DeVos confirmed as the next education secretary, and complained on the Senate floor that DeVos is the worst choice imaginable for the job.

“It is difficult to imagine a worse choice to head the Department of Education,” she said on the Senate floor. “Betsy DeVos doesn’t believe in public schools. Her only knowledge of student loans seems to come to her own financial investments connected to debt collectors who hound people with student loans.”