Former Democrat Vice President Al Gore on Monday compared the Trump administration to Nazi Germany and suggested President Trump is a "threat" to the Constitution. 

Gore, a climate-change activist and the Democratic Party's 2000 presidential nominee, made the comments at an event at the start of Climate Week in San Francisco. 

He said the Trump administration is attempting to "create their own preferred version of reality” to accomplish goals similar to those of Adolf Hitler's leadership of Germany in the 1930s and 1940s. 

“I understand very well why it is wrong to compare Adolf Hitler’s Third Reich to any other movement,” Gore said, according to the news outlet Politico. “It was uniquely evil, full stop. I get it. But there are important lessons from the history of that emergent evil.”

Gore was vice president under President Bill Clinton from 1993 to 2001. He said "populist authoritarian leaders" used migrants as scapegoats to get into power. 

Trump made a vow to end illegal migration in the U.S. a major part of his winning 2024 presidential reelection campaign, and he has attempted to carry out that promise with large-scale deportations that have faced legal challenges.

"And power-seeking is what this is all about," Gore said. "Our constitution, written by our founders, is intended to protect us against a threat identical to Donald Trump."

Former House Speaker Nancy Pelosi, D-Calif., and San Francisco Democrat Mayor Daniel Lurie also spoke at the event.