Ron DeSantis’s bid for the Republican presidential nomination was already faltering even before he formally entered the fray on Wednesday in a much-touted launch on Twitter Spaces. As The New York Times noted, DeSantis “has struggled in recent polling, receiving an average across polls of around 20 percent among Republicans, falling far short of former President Donald J. Trump’s roughly 50 percent. The gap between the two men has grown steadily over the past few months, as Mr. Trump’s share has increased and Mr. DeSantis has lost ground.” Unfortunately for DeSantis, his decision to take up Elon Musk’s suggestion of...