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) 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.