It's unlikely that Trump has broken any law. As president, Trump has broad authority to declassify government secrets.

The Post said the intelligence partner had not given the United States permission to share the material with Russian officials. By doing so, Trump would have jeopardized cooperation from an ally familiar with the inner workings of the Islamic State group, and make other allies — or even U.S. intelligence officials — wary about sharing future top secret details with the president.

Afterward, White House officials took steps to contain the damage, placing calls to the CIA and the National Security Agency, the newspaper said.

The CIA and the Office of the Director of National Intelligence declined to comment Monday evening.

Congressional Republicans and Democrats expressed concern about the report.

GOP Sen. Bob Corker of Tennessee, chairman of the Senate Foreign Relations Committee, told reporters the Trump White House "has got to do something soon to bring itself under control and order."