State Sen. Sarah McBride won the Democratic primary for Delaware’s lone seat in the U.S. House of Representatives, poising her to make history as the first openly transgender congressmember.

State Sen. Sarah McBride has won the Democratic primary for Delaware’s lone seat in the US House of Representatives in a bid to become the first openly transgender person elected to Congress.

McBride, who already made history as the first transgender state senator, won her primary in Delaware. Now, she faces a Republican opponent for the state's lone House seat.

McBride’s now all but certain to head to Congress, as its first transgender member, eight years after she became the first trans speaker at a national convention. For four years, McBride had been a productive legislator in Dover;