Trump’s been making a lot of wild promises lately. All restraints are gone. He’s even bribed the oil companies with vows to remove all regulations if they’ll give him a billion dollars. Dave Weigel took a look at how its landing: Ending all taxes on tips. Declassifying all files on 9/11 and the JFK assassination. Freeing a darknet market mogul from prison. Protecting Bitcoin and TikTok from government meddlers. In his four-year presidency, Donald Trump did none of that. In the last few weeks, he’s promised to do all of it — sometimes in front of crowds ready to cheer his new policies, sometimes with interviewers who don’t ask why he flipped. Democrats, already battling voter “Trumpnesia” and warmer feelings about the MAGA years, are now wrestling with out-of-nowhere promises that don’t match up with Trump’s record. The latest promise, to make tipped wages tax-free, debuted at Trump’s Sunday rally in Las Vegas. “We’re going to do that right away, first thing in office,” said the Republican nominee. “It’s been a point of contention for years and years and years.” Trump had never endorsed this before, or mentioned it during 2017’s yearlong tax cut debate. The Biden campaign said that Trump’s “wild campaign promise” couldn’t be trusted, and that Democrats wanted to end the tipped minimum wage, a policy with more direct worker benefits, which Republicans opposed. But on Monday night, Fox News praised Trump’s “tip tax cut” and explained how it could swing the election. On Wednesday, Trump-endorsed Nevada US Senate Sam Brown told NBC News that the “visionary” ex-president had “scooped” him on…