President Donald Trump has moved to slash $4.9 billion in foreign aid using an executive maneuver last applied nearly five decades ago. In a letter to House Speaker Mike Johnson (R-LA), posted on social media, Trump indicated that the funds come from programs managed by the State Department.

The Trump administration has brought its fight against foreign aid spending to the Supreme Court, asking the justices to block billions of dollars intended for overseas programs. The Justice Department’s move signals a significant escalation in the ongoing dispute over how—and whether—the U.S. government should fund international assistance.

Republican senators are pushing back against President Trump’s proposed cuts to foreign aid and public media, signaling internal disagreements over budget priorities.