Sarah McBride will become the first openly transgender-identifying person to serve in Congress after winning Delaware’s at-large U.S. House seat Tuesday night. McBride, a Delaware state senator, is a biological man who identifies as a woman.

Delaware state Sen. Sarah McBride (D) was projected to win her election Tuesday for Delaware’s at-large House district, making history as the first openly transgender person elected to Congress, according to Decision Desk HQ.

Delaware made history on election night as voters elected the state's first Black U.S. senator and the first openly trans person to serve in Congress. CBS News projected Delaware state Sen. Sarah McBride as the winner of the race for Delaware's single U.