Until recently, Biden would only call Trump "the other guy" or make the sign of the cross when discussing him, as the veteran Democrat tried to focus on his own economic policies. "He's like Voldemort now: His name shall not be mentioned," talk show host Conan O'Brien joked in a recent interview with Biden, comparing Trump to the unnameable villain from the Harry Potter novels. Keen to avoid fueling Trump's claims of a political witch hunt, Biden also steadfastly avoided talking about the multiple criminal cases against the former president and reality TV star. The result was that Trump could...