A Bernie Sanders campaign volunteer recorded the 78-year-old Democratic presidential candidate boogying down at a party in New Hampshire, and the video took off on social media.
The Vermont senator shared a clip on his Twitter page, showing him shaking it to ABBA on Saturday night (November 23), and writing, "having the time of my life." Sanders suffered a health scare last month when his campaign announced the candidate had a heart attack.
That prompted questions about whether his age might be an issue for voters.
He's the oldest of at least 18 Democrats vying for the nomination.
He was born a year before front-runner Joe Biden, and he's six months older than Michael Bloomberg, the newest entry to the race.
It's unclear whether the heart attack hurt Sanders in the polls.
Most measures show him still locked in a tight race for second place with fellow Senator Elizabeth Warren.