Trump should allow Biden to do what Biden does so well: to descend into rambling, shrewish incoherence, while his focus should be on what a future under Donald Trump might look like.As all the world knows, Donald Trump is scheduled to debate Joe Biden this coming Thursday, June 27 [I had July! Sorry for the error], at 9:00 p.m. Eastern Time. The debate will take place in Atlanta, Georgia, will be hosted by CNN, and will be presided over by CNN’s Jack Tapper and Dana Bash. In other words, Trump will be playing on Biden’s home field.It’s partly a testament...