Former New York City Mayor Michael Bloomberg filed paperwork Thursday to run for president as a Democrat.
But the billionaire has not announced an official presidential bid. According to The Hill, an aide to Bloomberg said the filing was "another step towards running."
Earlier this year, the 77-year-old said he wouldn't run for president, but he's taken steps here and there to ensure a presidential bid isn't completely off the table.
Earlier this month, Bloomberg filed paperwork to run in Alabama's 2020 Democratic presidential primary. He's also filed in Arkansas and Tennessee.
Bloomberg is a vocal critic of President Donald Trump. Recently, Bloomberg announced a $100 million digital ad campaign attacking President Trump in four general election swing states: Arizona, Michigan, Pennsylvania and Wisconsin.
He's also reportedly planning to spend $15-$20 million to register half a million voters in an effort to hurt President Trump's reelection chances in five states.
Some Democratic presidential candidates have already criticized his attempts to run, saying he'll try to buy the presidency. If Bloomberg enters the race, he would be the second billionaire, after Tom Steyer, running as a Democrat.
