Joe Lieberman said today that President Obama "should seriously consider" keeping Guantanamo Bay open, becoming the highest profile non-Republican to cast doubt on the administration's plan to close the controversial facility.

Lieberman made the remarks in an NPR interview that will air later today. (The Weekly Standard first reported Lieberman's comments, which Greg Sargent then confirmed from the Senator's office.)

With the Obama administration reportedly backing off its plan to bring some detainees to the United States, Lieberman's comments may increase Capitol Hill skepticism about what to do with suspected terrorists held at Gitmo.