President Trump has found a new measure to judge his presidency -- Wall Street. Trump has made a habit of touting the markets' rise as evidence of his administration's performance. He celebrated the Dow 20,000 milestone on Twitter (TWTR) - Get Twitter, Inc. Report last month, and just this week, he touted the market rally again on Twitter and at a press conference at the White House. Trump noted on Thursday something investors will want to keep in mind moving forward: the Trump rally is largely predicated on the promise of tax reform. And while tax cuts are likely, they're not here yet.