Former Tennessee Education Commissioner Kevin Huffman says Betsy DeVos should resign as the nation’s education chief because of her boss’s ambivalent response to racist violence in Charlottesville undercut her ability to work on behalf of public school students, reports Chalkbeat Tennessee.

Huffman, who was appointed commissioner by Gov. Bill Haslam in 2011 and served through 2014, initially called for DeVos to resign in a series of tweets Thursday, then elaborated.

“There have been a lot of generic calls on people in the administration to resign, but it’s too easy for everyone to duck responsibility,” said Huffman, now an education consultant and writer living in Nashville. “I think it’s appropriate for people to call out specific people in our own field.”

He said the education secretary’s main responsibility is to uphold civil rights in schools — and Trump’s comments mean “she has lost the moral authority to do her job.”

“I can’t imagine Secretary DeVos walking into a room of educators and explaining that your civil rights agenda is to advance all kids, particularly children of color. How would you have the moral authority to have that conversation, given the things your boss has said, particularly when you’re unwilling to call out your boss?” he said.

DeVos posted several tweets over the weekend criticizing the “behavior and the violence and hate-filled rhetoric displayed” in Charlottesville.