'Trouble is brewing': Data guru highlights trend that signals 'very bad' year for GOP

House Republicans are sprinting for the exits, and CNN's Harry Enten said they know "trouble is brewing."

A record 36 Republicans have already announced they will not seek re-election in November, the most in a century, and the network's chief data analyst explained what that means for the GOP's chances for holding on to their House majority.

"You know, I would say that House Republicans are running for the exits faster than kids do on the final day of school," Enten said. "I mean...