President Biden says he'd be 'sleeping alone' if he wasn't a Philadelphia Eagles fan alongside his 'Philly girl' wife, Jill Biden

• President Biden joked that he'd be "sleeping alone" if he wasn't an Eagles fan alongside his wife.
• First lady Jill Biden, who grew up in the Philadelphia suburbs, is a longtime fan of the team.
• "I mean, it's — it's really absolutely amazing. I mean, the certitude," he said of his wife's faith in the team.

First lady Jill Biden, whom President Joe Biden calls a true "Philly girl," loves the Philadelphia Eagles.

So with the Eagles set to play the Kansas City Chiefs in Super Bowl LVII on Sunday, he couldn't help but remark on her longtime football fandom this week.

Biden, a native of Scranton, Pa., represented nearby Delaware in the Senate for 36 years before serving as vice president and then as president.

But Jill Biden, who graduated from high school in the Philadelphia suburbs, doesn't play around when it comes to her team.