Continuing the military commissions in any form would probably prompt sharp criticism from human rights groups as well as some of Mr. Obama’s political allies because the troubled system became an emblem of the effort to use Guantánamo to avoid the American legal system…

Obama administration officials — and Mr. Obama himself — have said in the past that they were not ruling out prosecutions in the military commission system. But senior officials have emphasized that they prefer to prosecute terrorism suspects in existing American courts. When President Obama suspended Guantánamo cases after his inauguration on Jan. 20, many participants said the military commission system appeared dead…

“The more they look at it,” said one official, “the more commissions don’t look as bad as they did on Jan. 20.”…

Still, during the presidential campaign Mr. Obama criticized the commissions, saying that “by any measure our system of trying detainees has been an enormous failure,” and declaring that as president he would “reject the Military Commissions Act.”