A film producer and mother of two in California posted a short message of praise on Monday after Vice President Kamala Harris’s recent appearance on the “Call Her Daddy” podcast.

“Love this,” the producer, Kerstin Emhoff, wrote above a clip in which Ms. Harris and the podcast’s host, Alex Cooper, discussed some women’s choice not to have children.

Ms. Emhoff has been regularly proclaiming her support for Ms. Harris’s presidential campaign on Instagram and X. None of which would be remarkable for a 57-year-old registered Democrat, but the woman she’s supporting also happens to be her ex-husband’s new wife.

“After 33 years of unwavering friendship and two amazing kids, I’m incredibly proud of this man and our blended family,” Ms. Emhoff wrote in an Instagram post featuring her and her former husband at the Democratic National Convention.

Although Ms. Harris and the Emhoffs have spoken about their blended family in the past, Ms. Harris’s candidacy for the nation’s highest office has brought fresh attention to these types of familial structures, especially the idea that they can be healthy, respectful and loving.

The dissolution of a marriage is rarely painless, and staying on good terms with an ex is often considered an achievement in itself. (The Emhoffs divorced in 2009, after an affair that Mr. Emhoff had with a teacher at his children’s school several years before he was introduced to Ms. Harris in 2013, on a blind date.) So to be not merely cordial with but a cheerleader for an ex’s new partner, as seems to be the case for Ms. Emhoff and Ms. Harris, has struck some Americans as notable.