President Trump’s would-be assassin, Ryan Routh, begged a federal judge to allow him to “freeze to death In Siberia” as part of a prisoner exchange with Russia in a bizarre letter last month where he also offered himself up to Hamas and other US adversaries. Routh, who is currently locked up in a Miami federal prison as he awaits trial on the attempted assassination of Trump on his Palm Beach, Fla., golf course last September, bemoaned that he won’t face the death penalty if convicted before asking Judge Aileen Cannon to “trade me away” in the unhinged jailhouse letter, released...