The Department of Education has opened investigations into 45 colleges, including some of the nation’s most prestigious institutions, over their alleged refusal to end racial preferences in PhD programming.

The Trump administration is following through on its threat to crack down on colleges’ race-based programs, beginning with a small postgraduate recruitment partnership.

The US Department of Education opened an investigation on Friday into dozens of universities over diversity, equity and inclusion programs that President Donald Trump alleges discriminate against white students.