U.S. President Joe Biden on Monday commuted the sentences for 37 out of 40 federal inmates on death row, converting them to life in prison without parole before he hands over power to President-elect Donald Trump on Jan. 20. Biden's move will frustrate Trump's plan to resume a rapid pace of executions. Unlike executive orders, clemency decisions cannot be reversed by a president's successor, although the death penalty can be sought more aggressively in future cases.