Bevan Dufty, an openly gay San Francisco mayoral candidate, released on Tuesday his first campaign ad, which features his five-year-old daughter Sidney Maely Goldfader Dufty.

In Someplace New, Dufty and daughter are seen riding the city's subway (the San Francisco Municipal Railway or MUNI).

“I ride MUNI every day,” Dufty is heard saying in the 30-second ad. “I enjoy it most when I'm with Sidney. She doesn't notice that it's too crowded or that it can run a half-hour late.”

“Sidney thinks MUNI is magic,” he adds. “We go underground and come out someplace new. Just us. I want all of us to see it that way.” (The video is embedded in the right panel of this page.)

According to the Huffington Post, the ad is groundbreaking in showing an openly gay candidate with his/her child.

Dufty has served two terms on the San Francisco Board of Supervisors representing the same district Harvey Milk, one of America's first openly gay elected officials, did in the late 1970s. His bid for mayor has the endorsement of the Gay & Lesbian Victory Fund. If elected, Dufty would become San Francisco's first openly gay mayor.