flew into Wilmington, Del., on Sunday night, where his 54-year-old sonâs felony gun trial begins Monday, and will spend the whole day there with no official duties. Joe Bidenâs looming presence in the strange small city leaves nobody in any doubt of the message he is sending to Delaware special counsel David Weiss, the prosecutors, the judge, and the jury pool being chosen Monday: You mess with my son, you mess with me. Itâs all very subtle, in a flagrant way, much like Joeâs impromptu visit to Hallie Biden, the widow of Beau and former lover of Hunter, just nine...