George Clooney and Julia Roberts are beseeching you — chip in $25 to Democrats’ fundraising operation today to enter their “Premiere Night with the Presidents” contest. The fundraising blast, which has shown up consistently in inboxes over the past week, is the clearest sign that the Democratic Hollywood machine is cranking back into gear with the presidential election just five months away. In recent weeks, actor Robert DeNiro showed up in lower Manhattan for a press conference at the Biden campaign’s behest. Mark Hamill of Star Wars fame made a White House briefing room appearance to ask if he could...