As MAGA supporters cheered a conservative — and disgraced — political commentator’s reporting that President Joe Biden plans to withdraw from the presidential race as early as this weekend, critics agreed: be plenty skeptical — and it’s probably false. Mark Halperin, a commentator for the far-right-leaning Newsmax TV, reported Thursday, citing multiple anonymous sources, that while Biden plans to drop out, he will “NOT resign the presidency” and “will NOT endorse [Vice President Kamala] Harris.” Furthermore, according to Halperin, he’ll endorse an open convention with Harris and about three ot…