Former President Barack Obama warned Democrats not to demonize their political opponents Wednesday even as President Joe Biden delivered a speech attacking “MAGA Republicans” and tying them to last week’s assault on Speaker Nancy Pelosi’s husband.

Obama told a rally in Phoenix, Arizona, that demonizing opponents with “over-the-top” rhetoric could result in physical violence:

“One thing is clear, and that is this increasing habit of demonizing political opponents, of just yelling and thinking not just that I disagree with someone, but that they’re evil and wrong,” Obama said. “That creates a dangerous climate. And when we have politicians and elected officials in leadership positions who continue to promote over-the-top rhetoric or make light of it … more people are going to get hurt.”

Obama did not specifically mention Biden, his former vice president. Biden gave a speech at Union Station in which he reprised some of his attacks from his Sep. 1 speech at Independence Hall, casting Republicans as extremist and dangerous to democracy.