Michael Bloomberg says he's once again a registered Democrat

Michael Bloomberg changes party affiliation, re-registers as Democrat

Michael Bloomberg changes party affiliation, re-registers as Democrat

Tennessee Democratic Senate candidate Phil Bredesen was filmed attending a fundraiser in New York City with multibillionaire - and now official Democrat - Michael Bloomberg.

And Bloomberg has been a life-long social liberal, supporting - often with millions of dollars - such progressive causes as environmental protection, strict gun control, and abortion as a fundamental human right. But he did leave, at least on paper, and now he as come home to roost - quite possibly in preparation for a 2020 presidential candidacy.

Bloomberg, who served as Mayor of NY for three terms, has had a variety of party affiliations throughout the years.

The global media company founder said he has registered as a Democrat, which would be especially significant if he decides to challenge US President Donald Trump in 2020. "Two years ago at the Democratic Convention, I warned of those threats", his post read.

He goes on to say "we need Democrats to provide the checks and balance our nation so badly needs". "So if you ran, yeah, you'd have to run as a Democrat". Elizabeth Warren of Massachusetts, Sen. Kamala Harris of California and self-styled socialist Democrat Sen.

He also considered a run for the White House in 2008, 2012 and 2016.

FILE - Hundreds of demonstrators march across the Brooklyn Bridge to call for tougher gun control laws, June 14, 2014, in NY.

Bloomberg, 76, has been a political independent since abandoning his Republican Party registration in 2007.

The change in party affiliation comes after Bloomberg chose to spend millions in the 2018 election to help elect Democrats. But in June, he announced that he'd support Democrats in the November elections, accusing Republicans of doing "little to reach across the aisle to craft bipartisan solutions".

File picture of Michael Bloomberg. He has vowed to spend at least $100 million - $80 million on House races and $20 million on Senate races.