Residents wait in line to vote at a fire station during the midterm election in Houston, Texas, U.S. November 6, 2018.

Democratic New York Governor Andrew Cuomo casts his vote at the Presbyterian Church in Mt. Kisco, New York, U.S., November 6, 2018.

Democratic congressional candidate running in the 49th district Mike Levin gets an "I Voted" sticker put on by his wife Chrissy after they voted during midterm elections in San Juan Capistrano, California, U.S. November 6, 2018.

Republican gubernatorial candidate Brian Kemp is joined by his family as he prepares to vote in the midterm elections in Winterville, Georgia, U.S. November 6, 2018.

People queue to vote in the midterm elections in a supermarket in Houston, Texas, U.S., November 6, 2018.

New voters, including many University of New Hampshire students, stand in line to fill out voter registration forms in Durham, New Hampshire, U.S., November 6, 2018.

Supporters of Democratic congressional candidate Jahana Hayes dance at her midterm election night party in Waterbury, Connecticut, U.S. November 6, 2018.

U.S. Rep. Beto O'Rourke (D-TX), candidate for U.S. Senate poses with his family for a picture before voting in the U.S. 2018 midterm elections in El Paso, Texas, U.S., November 6, 2018.

U.S. Democratic Congressional candidate Deb Haaland, who is trying to become the first Native American woman in the U.S. House of Representatives, makes a midterm election day campaign stop in To'hajiilee Navajo Nation, New Mexico, U.S., November 6, 2018.

Voter Rojeli Flores casts his ballot in the midterm election at Sunueva Laundromat in Chicago, Illinois, U.S. November 6, 2018.

U.S. Democratic Congressional candidate Deb Haaland, who is trying to become the first Native American woman in the U.S. House of Representatives, hugs her mother Mary during a campaign stop at a Democratic Party field office on midterm elections day in Albuquerque, New Mexico, U.S., November 6, 2018.

Supporters wait to enter an election night party for Republican U.S. Senator Ted Cruz in Houston, Texas, U.S. November 6, 2018.

Democratic candidate Christine Hallquist votes during the midterm election in Hyde Park, Vermont, U.S. November 6, 2018.

Democratic New York Governor Andrew Cuomo and his girlfriend Sandra Lee arrive to cast their votes at the Presbyterian Church in Mt. Kisco, New York, U.S., November 6, 2018.

Republican candidate for Governor Ron DeSantis arrives to vote, carrying his daughter Madison, in the midterm elections at a polling place in Ponte Vedra Beach, Florida, U.S., November 6, 2018.

Voters cast ballots for the midterm elections at a polling station set up at the West Des Moines Fire Station 18 in West Des Moines, Iowa, U.S., November 6, 2018.

Election official Bill McClure assists voters at a polling place in Portsmouth, New Hampshire, U.S., November 6, 2018.

Campaign supports cheer for Democratic congressional candidate Amy McGrath at her election night party in Richmond, Kentucky, U.S. November 6, 2018.

U.S. Democratic Congressional candidate Deb Haaland, who is trying to become the first Native American woman in the U.S. House of Representatives, talks to Miss Navajo Nation Autumn Montoya during a midterm election day campaign stop in To'hajiilee Navajo Nation, New Mexico, U.S., November 6, 2018.

Democratic congressional candidate Ilhan Omar is seen after voting during midterm election in Minneapolis, Minnesota, U.S. November 6, 2018.

Democratic congressional candidate Ilhan Omar walks to the vote counting machine after filling out her ballot during midterm elections in Minneapolis, Minnesota, U.S. November 6, 2018.

California Democratic gubernatorial candidate Gavin Newsom ties his son's shoelace after voting in the midterm elections in Larkspur, California, U.S. November 6, 2018.

People cast their ballots in the midterm election at William Ford Elementary School in Dearborn, Michigan, U.S. November 6, 2018.

Democratic gubernatorial candidate Andrew Gillum speaks to the media with his wife R. Jai Gillum and son after voting in the midterm election in Tallahassee, Florida, U.S., November 6, 2018.

Democratic New York Governor Andrew Cuomo holds a news conference after voting, standing next to him are his girlfriend Sandra Lee, and his daughter Cara Kennedy Cuomo at the Presbyterian Church in Mt. Kisco, New York, U.S., November 6, 2018.

U.S. Democratic Representative John Lewis puts on his "I'm Georgia Voter" sticker after casting a ballot in midterm elections at Wolf Creek Library in Atlanta, Georgia, U.S. November 6, 2018.

A vote sign points people to a local poling location during midterm elections in Newport Beach, California, U.S. November 6, 2018.

Democratic candidate for governor Michelle Lujan Grisham greets diners at Barelas Coffee House on midterm elections day in Albuquerque, New Mexico, U.S., November 6, 2018.

Bobby Mines waves an American flag outside a polling place in Chapmanville, West Virginia, U.S. November 6, 2018.

Lawrence Malloy, a supporter of Georgia Democratic gubernatorial nominee Stacey Abrams, shows off socks adorned with an image of Abrams outside the site of a midterm election night party in Atlanta, Georgia, U.S., November 6, 2018.

Democratic U.S. congressional candidate Rashida Tlaib points to her 'I voted' sticker after voting during the midterm election in Detroit, Michigan, U.S. November 6, 2018.

Michigan Democratic gubernatorial candidate Gretchen Whitmer votes with her daughters Sherry and Sydney in midterm election at her polling station at the St. Paul Lutheran Church in East Lansing, Michigan, U.S. November 6, 2018.

A person dressed as a dinosaur urges people to vote in the midterm elections in Houston, Texas, U.S., November 6, 2018.

A sign showing support for Republicans is seen on the day of midterm elections at a farm near Humbird, Wisconsin, U.S. November 6, 2018.

Democratic candidate for the U.S. House of Representatives Chris Pappas (L) visits a polling place in Exeter, New Hampshire, U.S., November 6, 2018.

Actor Alyssa Milano visits volunteers at a field office for Congressional District 48 Democratic candidate Harley Rouda on the day of midterm elections, Huntington Beach, California,U.S. November 6, 2018.

Students wait in a long line at the ASU Palo Verde West polling station during the U.S. midterm elections in Tempe, Arizona, U.S. November 6, 2018.