The Democratic chairwoman of the Senate Intelligence committee commissioned a federal report to identify prison facilities in the U.S. that are suitable for housing Guantanamo detainees, concluding the option is viable -- despite congressional opposition to such a plan when the Obama administration proposed it.

Sen. Dianne Feinstein's renewed interest in the proposal first came to light Wednesday after Fox News turned up an internal Government Accountability Office document that refers to “Source of Work: Ms. Dianne Feinstein, Chair, Select Committee on Intelligence, U.S. Senate” and lists the “Gist of Work” as an investigation into whether domestic facilities could house the approximately 170 detainees remaining at the controversial facility in Guantanamo Bay, Cuba.