Republicans are wringing their hands about Teflon Don Oh heck. Maybe failing to push for the 2nd impeachment which would have barred him from office was a mistake. Oops. Florida Gov. Ron DeSantis’ technology-challenged but donor-rich entry into the GOP presidential primary cemented his place in the early primary as the chief alternative to Trump. But it will hardly clear the field. And with a growing cast of characters still waiting in the wings to announce their own campaigns, warning signs of a 2016 replay are once again flashing in the GOP. According to interviews with nearly a dozen GOP strategists, former candidates and party insiders, the intraparty dynamics now at play — and Trump’s own alchemical grip on the base — suggest a primary where a constellation of Republicans once again risk splitting the non-Trump vote in early nominating states. “If those people are all still in the race when January comes around, it’s going to be 2016 all over again, and Trump will win,” said Jason Osborne, the New Hampshire House majority leader who has endorsed DeSantis in the primary, at a Rockingham GOP dinner this week where Nikki Haley served as the keynote speaker. “That’s just how it is.” Even with DeSantis raising an eye-popping $8.2 million in his first 24 hours, the primary field is once again growing. South Carolina Sen. Tim Scott entered the race last week. Chris Christie, the former New Jersey governor, former Vice President Mike Pence and New Hampshire Gov. Chris Sununu…