“Donald Trump and the MAGA Republicans represent extremism that threatens the very foundations of our Republic,” Mr. Biden said, noting that not all Republicans follow Mr. Trump’s ideology. “But there’s no question that the Republican Party today is dominated, driven and intimidated by Donald Trump and the MAGA Republicans. And that is a threat to this country.”

Citing the “extraordinary experiment of self-government” represented by the American Constitution, Mr. Biden said that “history tells us a blind loyalty to a single leader and a willingness to engage in political violence is fatal to democracy.”

“MAGA forces are determined to take this country backwards,” Mr. Biden said. “Backwards to an America where there is no right to choose, no right to privacy, no right to contraception, no right to marry who you love.”

See omnystudio.com/listener for privacy information.