Tom Steyer, a Democratic megadonor and President Trump impeachment advocate, launched a presidential bid Tuesday vowing to spend $100 million on the race for his party’s nomination.

“If you think that there’s something absolutely critical, try as hard as you can and let the chips fall where they may. And that’s exactly what I’m doing,” Steyer, 62, said in an announcement video. “My name’s Tom Steyer, and I’m running for president.”