Problematic, in a very big way even if the offer was made.Qatar’s ties to Al Qaeda and ISIS aren’t news. They’ve effectively served as intermediaries in everything from ransom exchanges for hostages to Taliban negotiations. But actually trying to secure terrorist swaps for prisoners on their own behalf would have been a new frontier. Before he was released from a U.S. maximum-security prison last week, a confessed al Qaeda sleeper agent was offered up in a potential prisoner swap that would have freed two Americans held abroad.According to two individuals with direct knowledge of the case, the proposition was...