Michael Bloomberg, the former mayor of New York City and billionaire businessman, is considering entering the 2020 Democratic presidential primary race. He has not made a final decision yet. If he does run, Bloomberg would likely self-fund his campaign and have more financial resources than any other candidate. Some of his advisers are concerned about the rise of Elizabeth Warren in the polls and that the current Democratic candidates may not be well positioned to defeat Donald Trump. Bloomberg would file paperwork this week to run in the Alabama primary as a first step toward a potential presidential bid.