Tucker Carlson Beats CNN's Entire Prime Time Line-up Combined.

Fox News' ratings exploded last week after Attorney General William Barr sent his letter to Congress saying that Special Counsel Robert Mueller's investigation found no collusion between the Trump campaign and Russia.

At first, CNN responded to the blow out in ratings with CNN's Brian Stelter claiming: "Since the letter's release on Sunday, there hasn't been much news."

After Stelter's claim was widely mocked, CNN launched a new attack on Fox News, specifically targeting Carlson — after Carlson dominated their entire prime time line up.

"Over the last month, Tucker Carlson's commercial breaks have had only a smattering of ads from lesser-known brands," CNN tweeted on Tuesday night. "It might be a new normal for the Fox News host, who has endured ad boycott campaigns since he made racist remarks on immigrants in December."