Dan Baer, who is vying for the Democratic nomination in his bid to become the state’s first openly gay candidate for U.S. Senate, picked up an endorsement from the LGBTQ Victory Fund on Monday.

The 28-year-old national organization is dedicated to electing LGBTQ candidates. Baer is one of at least 10 Democrats hoping to unseat Republican U.S. Sen. Cory Gardner next year.

Baer’s office said Monday he would be only the fourth known LGBTQ person to serve in the U.S. Senate, joining Sens. Tammy Baldwin of Wisconsin, Kyrsten Sinema of Arizona and the late Harris Wofford of Pennsylvania, though  Harris was married to a woman when he served i the Senate from 1991 to 1995.

The Victory Fund said it a press release Monday that it expects an “unprecedented” number of LGBTQ candidates to run in 2020. The Victory Fund endorsed South Bend, Indiana, Mayor Pete Buttigieg for president on June 28.

RELATED: Democrat Dan Baer announces Senate run against Gardner

“Coloradans led the country by electing America’s first openly gay governor in 2018 – and in 2020 they will make history again in sending the first out gay man to the U.S. Senate,” former House Mayor Annise Parker, president and CEO of LGBTQ Victory Fund, said in a statement.

“Never before has an openly LGBTQ congressional candidate reported such strong initial fundraising numbers – an important indicator, given LGBTQ candidates for high-level office are often underestimated early in their campaigns. But Dan’s authentic and values-driven approach to politics is resonating with voters, and there is no better candidate to take on anti-LGBTQ incumbent Cory Gardner than a person so deeply affected by the discriminatory positions Gardner promotes.”

Last year Colorado voters elected then-U.S. Rep. Jared Polis of Boulder as the state’s first openly gay governor.

Editor’s note: This story was update to note that Sen. Harris Wofford did not serve as openly gay.