Billionaire Tom Steyer—whose name recognition of late centers around his campaign to impeach President Donald Trump—officially entered the presidential race on Tuesday, vowing to confront corporations and lessen their sway over the political system.

"I think people believe that the corporations have bought the democracy. That the politicians don't care about them or respect them," he said in a video announcement. "Really what we're trying to do is make democracy work by pushing power down to the people."

Although Steyer has not yet outlined a policy platform, he has been an ardent climate change activist, as well as a vocal opponent of Trump's, launching a $10 million national advertisement to unseat the president. "He's brought us to the brink of nuclear war, obstructed justice at the FBI, and in direct violation of the U.S. Constitution, he's taken money from foreign governments, and threatened to shut down news organizations that report the truth," Steyer says in the ad.