The proposal is almost certainly illegal, experts said, but President Trump’s eagerness to entertain it showed his willingness to embrace extreme measures to demonstrate he is tough on crime.

The Trump administration and the president of El Salvador said they struck a deal allowing the U.S. to ship detained migrants and imprisoned criminals to a mega-prison there

SAN JOSE, Costa Rica (AP) — Secretary of State Marco Rubio said Tuesday that El Salvador’s offer to accept and jail violent American criminals raises clear legal issues but described it as “very generous” and said that President Donald Trump would make a decision on whether to accept it.