The coronavirus pandemic has upended the 2020 presidential campaign. Rallies have been canceled, primaries are being delayed, and even where voting is taking place on schedule, canvassing and other normal politicking is on hold as voters increasingly shelter in place. Slowing the spread of the virus has taken precedence over getting the message out, forcing the candidates off the trail.President Trump, however, is just as visible as ever. While former Vice President Joe Biden and Sen. Bernie Sanders have been relegated to the sidelines, Trump has been a fixture of the White House’s daily press briefings on the coronavirus. While the setting and subject matter are vastly different than his freewheeling “Make America Great Again” rallies, Trump still manages to get in his trademark flourishes. There are the jokes (Trump pretended to flee when coronavirus...