An order by President Donald Trump freezes potentially trillions of dollars of grants and loans, but Congressional leaders and legal experts say the move is against the law.

"It is blatantly unconstitutional," one senator says as agencies grapple with pausing nearly all grants and loan programs.

A federal judge on Tuesday delayed a sweeping order by the Trump administration to freeze trillions in federal grants and loans just as it was set to go into effect, after the move sowed confusion and panic among state,