Taking to Twitter, as various US states approach/pass voter registration deadlines, Buttigieg reminded followers: "We need to be clear with anyone who considers themselves an ally: LGBTQ+ equality is on the ballot."
The politician also marked National Coming Out Day with a series of tweets, saying: "While every struggle is different, every struggle is connected. So whether you've been out for decades, today is your day, or you're still not ready - know that there is a big, diverse community where you belong."
He added: "Coming out means being vulnerable, and placing your trust in another person. I know the courage it takes, and I'm humbled by that trust anytime someone shares with me - sometimes as soon as we meet - that they are in the process of coming out as LGBTQ+."