Sen. /www.huffingtonpost.com/news/elizabeth-warren/"}}">Elizabeth Warren (D-Mass.) grilled secretary of education nominee Betsy DeVos on Tuesday, making the billionaire philanthropist’s lack of experience painfully obvious.

DeVos’ controversial nomination has been met with opposition from Democrats and education activists who argue that her role leading the nation’s education policy could be a threat to civil rights. She’s been a longtime advocate of school choice and has donated millions to conservative politicians and causes, including programs that fight against marriage equality and LGBTQ rights.

During DeVos’ hearing before the Senate Committee on Health, Education, Labor and Pensions, Warren took aim at the billionaire’s lack of experience with student loans, Pell Grants and public education.

“Tonight at her confirmation hearing, I asked Betsy DeVos a straight forward set of questions about her education experience and commitment to protecting students cheated by for-profit colleges,” Warren said in a message posted to her Facebook page. “If Betsy DeVos can’t commit to using the Department of Education’s many tools and resources to protect students from fraud, I don’t see how she can be the Secretary of Education.”

Watch the exchange in the video above.