Senators Joseph Lieberman and Kelly Ayotte have this op-ed in the WaPo:

The United States has a first-rate, professionally run facility at Guantanamo Bay, Cuba, that is designed for terrorist detentions, interrogations and military trials. So why would a suspected Somali terrorist, captured half a world away, be held on a Navy ship for two months of interrogations and then brought to a New York federal court for trial? In our opinion, there is no good reason.