Is she right there whenever Biden faces the cameras in case he keels over? Or is this some attempt to add presidential “gravitas” to a problematic choice for the ticket, so lacking in appeal that she dropped out of the presidential field before the Iowa caucuses? Or, are we being prepared for Harris to assume the presidency sooner than anyone expected? Whatever the motives, Joe Biden’s handlers seem to have decided that they need to double-team presidential public events when the cameras start rolling....But I wonder if it really adds luster to Harris to show up, masked, with nothing better...