October 10, 2018, Bloomberg announced that he had returned to the Democratic party. 2020 presidential campaign On March 5, 2019, Bloomberg had announced that he would not run for president in 2020. Instead, he encouraged the Democratic Party to "nominate a Democrat who will be in the strongest position to defeat Donald Trump". However, due to his dissatisfaction with the Democratic field, Bloomberg reconsidered. He officially launched his campaign for the 2020 Democratic nomination on November 24, 2019. Bloomberg self-funded his campaign from his personal fortune, and did not accept campaign contributions. Bloomberg's campaign suffered from his lackluster performance in two televised debates. When Bloomberg participated in his first presidential debate, Elizabeth Warren challenged him to release women from non-disclosure agreements relating to their allegations of sexual harassment at Bloomberg L.P. Two days later, Bloomberg announced that there were three women who had made complaints concerning him, and added that he would release any of the three if they request him to do so. Warren continued her attack in the second debate the next week. Others criticized Bloomberg for his wealth and campaign spending, as well as his former affiliation with the Republican Party. As a late entrant to the race, Bloomberg skipped the first four state primaries and caucuses. He spent $676 million of his personal fortune on the primary campaign, breaking a record for the most money ever spent on a presidential primary campaign. His campaign blanketed the country with campaign advertisements on broadcast and cable television, the Internet, and radio, as well as direct mail. Bloomberg also spent heavily on campaign operations that grew to 200 field offices and more than 2,400 paid campaign staffers. His support in nationwide opinion polls hovered around 15 percent but stagnated or dropped before Super Tuesday, while former vice president Joe Biden had become the centrist frontrunner after receiving the support of major candidates Pete Buttigieg and Amy Klobuchar shortly before Super Tuesday. Bloomberg suspended his campaign on March 4, 2020, after a disappointing Super Tuesday in which he won only American Samoa, and subsequently endorsed Biden. Bloomberg donated $18 million to the Democratic National Committee and publicly planned a "massive spending blitz" to support Biden's campaign. When a 60 Minutes correspondent remarked on March 1 that Bloomberg had spent twice what President Trump had raised, he was asked how much he would spend. Bloomberg replied, "I'm making an investment in