President Donald Trump’s student-loan changes are facing another legal battle.

On Tuesday, a coalition of unions filed a lawsuit against the Department of Education seeking to block Trump’s new student-loan changes, including its narrowed definition of professional degrees. The suit argues that the administration violated administrative procedure in its rule and that it will harm public service professions.

The coalition includes the American Federation of State, County, and Municipal Employees, American Federation of Teachers, National Nurses United, and the AFL-CIO.

On July 1, the Education Department rolled out a $100,000 lifetime borrowing…