As the first female vice-president and the first woman of colour to be nominated for the role, Kamala Harris has made history with her journey to the White House.
Jill Biden, wife of president-elect Joe Biden, is expected to assume the title of first lady. Spouses of previous vice-presidents were given the informal designation of second lady.
But now, as a result of Harris’s successes, her husband, Doug Emhoff, will break new ground too – as the US’s first second gentleman.
The 56-year-old entertainment lawyer and father-of-two from California is also thought to be the first Jewish person to assume the “second spouse” role.
At Biden’s first joint appearance with Harris as his running mate, the incoming president said: “Doug, you’re going to have to learn what it means to be a barrier-breaker yourself in this job you’re about to take on.”
But already he appears to be reveling in the role.
“I’m not overly political,” he told Marie Claire in October. “I’m overly her husband.”
His bio on Twitter, where he posted a steady stream of pictures and videos from the campaign trail, reads: “Dad, @kamalaharris hubby, lawyer, wannabe golfer, advocate for justice and equality.”