“I’m so proud of our country,” Sen. Mark Udall (D-CO) said as he introduced First Lady Michelle Obama at a campaign event on Thursday. “We showed that Dr. Martin Luther King [Jr.] had it right. Which is that in America, at our best, we judge people by the content of their color.”

Udall quickly corrected himself.

“The content of their character, not the character of their skin,” he said.