Hunter Biden arrived in a Delaware federal court on Wednesday morning expecting that, in a few short hours, he would walk out a free man with full immunity from prosecution for an exceedingly wide range of alleged criminal conduct, ranging from gun and drug charges to foreign influence peddling. His expectation was that his deal would be insulated from challenges from the presiding judge, or from a prosecutorial change of heart under a future administration. His expectation was that his legal ordeals were coming to a close.