In 2012, a Republican named Fred Karger was the first openly gay Presidential candidate. He didn’t get far then, but he did help set the stage for Democrat Pete Buttigieg, the mayor of South Bend, Indiana, who launched a more viable candidacy in 2016. That historical run for the nomination led to a high-profile career as the current U.S. Transportation Secretary, and will now be the subject of “Mayor Pete,” a documentary for Amazon, from filmmaker Jesse Moss. Moss co-directed (along with Amanda McBaine, who’s co-producing here) the acclaimed doc “Boys State.” The film will focus on Buttigieg’s rise from mayor into the ranks of the Democratic Party, his campaign successes and losses, and a look into his home life with husband Chasten. It’s another step forward, for sure, one of the ways political history gets built, and we’ll be looking forward not only to the film but to a Harris/Buttigieg ticket one day soon.