WASHINGTON — President Obama said Tuesday that he would recommit himself to closing the Guantanamo Bay prison, a goal that he all but abandoned in the face of congressional opposition in his first term and that faces steep challenges now.
‘‘It’s not sustainable,’’ Obama said at a White House news conference. ‘‘The notion that we’re going to keep 100 individuals in no man’s land in perpetuity,’’ he added, makes no sense. ‘‘All of us should reflect on why exactly are we doing this? Why are we doing this?’’