Don Lemon told a CNN network contributor to “shut up” on Tuesday’s show after the guest wouldn’t let the anchor finish his point about what constitutes as “mob behavior,” writes The Hill.

Contributor Matt Lewis, who also serves as a columnist for the Daily Beast, got into a back-and-forth with Lemon and another panelist on CNN Tonight over Sen. Ted Cruz (R-Texas) and his wife being run out of a restaurant.

Lewis said that he admits that it’s “mob behavior” when President Donald Trump’s supporters chant “Lock her up!” at his campaign rallies, but that he never hears “liberals” call out those on the left when people confront politicians out in public.

Lemon dismissed Lewis’ claims that the Tea Party “didn’t hound people out of restaurants.”

“The Tea Party did hound people. The Tea Party people hounded me when I went out to cover them!” said Lemon.  “And do you know what I said? It was their right to do it because they’re Americans!”

“Don, if they started following you around a restaurant and running you out of places,” replied Lewis.

“But that doesn’t mean that people don’t get to object,” Lemon continued. “That’s your right as an American to object. It’s covered in the First Amendment. It’s like the first one!”

Lemon and Lewis then debated over the definition of the word mob and how it should be applied when talking about people confronting elected officials in public. When Lemon tried to make his point, Lewis kept interrupting him, prompting the CNN star to tell him to “shut up.”

Will you let me finish? Matt, please! Let me finish,” said Lemon.

“Bring it on. Mind if I have a drink?” Lewis asked.

“You can do whatever you want. You can leave the show if you want,” Lemon replied.

“I’m not going to do that,” Lewis said.

“Shut up and let me do it,” Lemon said.

“In the Constitution, you can protest whenever and wherever you want. It doesn’t tell you that you can’t do it in a restaurant, that you can’t do it on a football field. It doesn’t tell you that you can’t do it on a cable news you can do it wherever you want,” Lemon said. “To call people mobs because they are exercising their constitutional right is just beyond the pale.”

Check out a video of the segment below.