There were historic firsts across the country on Tuesday night, as voters chose from a set of candidates that was among the most diverse ever to run in the United States. Native American, Muslim and African-American women, and L.G.B.T. candidates, were among those who broke barriers. In next year's session of Congress, there will be at least 100 women in the House for the first time in history. Sharice Davids [is] the first lesbian Native American to be elected to the House and part of "a rainbow wave" of L.G.B.T. candidates in this year's election. She has criticized the Republican tax bill and called for "a true tax cut for the middle class." Ilhan Omar, a Democratic state legislator in Minnesota, and Rashida Tlaib, a Democratic former state legislator in Michigan, became the first Muslim women elected to Congress after winning their House races. Ms. Omar will also be the first Somali-American to serve in Congress. Ms. Tlaib, a Palestinian-American attorney, has championed Medicare for All, a $15 minimum wage and abolishing the federal agency Immigration and Customs Enforcement. Ayanna Pressley will become the first African-American woman to represent Massachusetts in Congress. She beat a 10-term incumbent in the Democratic primary and vowed to pursue "activist leadership" to advance a progressive agenda. Alexandria Ocasio-Cortez, 29, became the youngest woman elected to Congress. Like Ms. Pressley, she defeated a white male incumbent who had served 10 terms in a Democratic primary.