Billionaire activist Tom Steyer on Tuesday officially entered the crowded field for the 2020 Democratic presidential nomination, reversing his earlier decision not to run.

“The other Democratic candidates for president have many great ideas that will absolutely move our country forward, but we won’t be able to get any of those done until we end the hostile corporate takeover of our democracy,” Steyer said in a statement along with a four-minute announcement video.

“As an outsider, I’ve led grassroots efforts that have taken on big corporations and won results for people. That’s not something you see a lot of from Washington these days. That’s why I’m running for president,” he added.

The 62-year-old former hedge fund manager, who founded the environmental advocacy nonprofit NextGen America, has spent millions seeking to gain support for the impeachment of President Trump, who has called him a “weirdo.”

On Tuesday, Steyer did not mention Trump’s impeachment, although the president was briefly seen in the video, as was his former campaign chairman Paul Manafort, who was seen being led away in handcuffs.

Steyer allies have told the Washington Post that he had grown increasingly dissatisfied with the nearly two dozen Democrats already in the running for the White House.

The Democratic National Committee declined to comment on questions pertaining to Steyer’s participation in the upcoming primary debates.

But the rules state that Steyer will have to either amass 65,000 donors or get 1 percent in three separate polls by July 16 in order to be on the debate stage in Detroit at the end of the month.

He’d also have to perform better than at least one of the candidates, as 20 contenders have satisfied one or both requirements for the July 30-31 confab as participation is capped at 20.

It will be an even harder reach to get on the debate stage in September and October, as the DNC has said that candidates will have to meet both a polling threshold – 2 percent in four separate polls – and attract 130,000 unique donors.

Steyer built a net worth that Forbes estimates at $1.6 billion with his hedge fund, Farallon Capital, which he sold in 2012. The NextGen America PAC has contributed about $230 million to Democrats in the 2014, 2016 and 2018 election cycles, according to the newspaper.

The Californian’s “Need to Impeach” group has amassed an email list of some 8.3 million names pushing for the cause.

Steyer entered the 2020 presidential race the day after Rep. Eric Swalwell of California dropped out.

He is expected to head to the Big Apple this week for a round of media appearances before traveling to early presidential primary and caucus states, according to NBC News.