Both Tlaib and Omar have extreme anti-Israel views.
But even though Minnesota is home to the largest Somali population in the country, and Tlaib's state of MI has a large population of Arab and Muslim Americans, this "Muslim wave" was about more than faith or ethnicity.
The Palestinian-American Muslim ran under the Democratic Party, having previously served six years in the state legislature.
The district sending Omar to Washington is considered a very safe seat for the Democrats; it was recently vacated by high-profile Rep. Keith Ellison.
Tlaib was born in Detroit to Palestinian immigrant parents. "I thought, 'This is not how we treat people in my state and in my country, '" she said.
"I've never been one to stand on the sidelines".More news: Cross Counter wins 2018 Melbourne Cup Flemington
She ran unopposed in a congressional district that stretches from Detroit to Dearborn, Michigan.
The women show a bit of the diversity of Muslims in the United States, one of the country's most diverse groups.
She has stated that President Donald Trump's "politics of fear" motivated her to run for the seat.
Davids, 38, of Kansas, is an attorney by training and a former mixed martial arts fighter.
In February, Omar spoke openly about what she saw as the president's prejudice against Muslims, saying there is no debate about "whether Trump is a racist".
Haaland, 57, of New Mexico, beat Janice Arnold-Jones, a Republican, and Lloyd Princeton, a Libertarian. She has captured national attention because of her life story as a refugee who made her way into elected office. She used that record of taking on corporate interests and defending local priorities as part of her campaign for election as a congressional representative.