Republicans gain control of Senate

U.S. Sen. Mitch McConnell (R-KY) celebrates with his wife Elaine Chao at his election night event Nov. 4, 2014 in Louisville, Kentucky. McConnell defeated Kentucky Secretary of State Alison Lundergan Grimes.

Mitch McConnell

10-year-old Gabriella Baiano holds a sign supporting U.S. Senate Minority Leader Mitch McConnell's re-election at the site of his midterm election night rally in Louisville, Kentucky Nov. 4, 2014.

Mitch McConnell

Supporters of Senator Mitch McConnell (R-KY) bow their heads in prayer during an invocation before the start of his election night rally in Louisville, Kentucky Nov. 4, 2014. Television news networks are projecting that McConnell will win the election.

Mitch McConnell

A supporter of U.S. Senate Minority Leader Mitch McConnell raises a sign at his election night rally in Louisville, Kentucky Nov. 4, 2014.

Mitch McConnell

Supporters of U.S. Senate Minority Leader Mitch McConnell applaud at his midterm election night rally in Louisville, Kentucky Nov. 4, 2014. Television news networks are projecting that McConnell will win the election.

Tom Cotton

Workers hang campaign signs for U.S. Rep. Tom Cotton (R-AR) and Republican candidate for U.S. Senate in Arkansas ahead of an election night gathering Nov. 4, 2014 in North Little Rock, Arkansas. Cotton is projected the winner over incumbent U.S. Sen. Mark Pryor (D-AR).

Shelley Moore Capito

West Virginia Republican Senate candidate Rep. Shelley Moore Capito celebrates after winning the Senate seat, Nov. 4, 2014, at the Embassy Suites in Charleston, W.Va.

Ed Markey

U.S. Sen. Ed Markey, D-Mass., and his wife Dr. Susan Blumenthal celebrate his re-election over Republican Brian Herr Nov. 4, 2014 in Boston, Mass..

Jeanne Shaheen

Supporters cheer as they watch election returns for Democratic U.S. Senator Jeanne Shaheen (D-NH) at her midterm election night rally in Manchester, New Hampshire November 4, 2014.

Susan Collins

Sen. Susan Collins, R-Maine celebrates her re-election victory over Democrat Shenna Bellows Nov. 4, 2014 in Portland, Maine.

Republican supporters

Hank Schwab of Atlanta (C), shows the campaign hat he's worn for the past 30 years at a gathering in support of Republican U.S. Senate candidate David Perdue at the InterContinental Buckhead Nov. 4, 2014 in Atlanta, Georgia. Perdue won the Georgia Senate seat beating Democratic U.S. Senate candidate Michelle Nunn.

Republicans celebrate

Republican supporters cheer as a giant TV screen displays the results of the midterm elections in Denver, Colorado, Nov. 4, 2014.

Joni Ernst

Republican candidate and state Senator Joni Ernst (R) hugs Lieutenant Governor Kim Reynolds after winning the Iowa U.S. Senate race in U.S. midterm elections defeating Democrat U.S. Representative Bruc Braley in West Des Moines, Iowa Nov. 4, 2014. Ernst is the first woman to represent Iowa in the U.S. Senate.

Joni Ernst

Supporters celebrate after hearing Republican candidate Joni Ernst won the Iowa U.S. Senate race at the Marriott Hotel 4, 2014 in West Des Moines, Iowa. Ernst and her opponent Democrat Rep. Bruce Braley (D-IA) were locked in a months-long campaign battle that had them tied in the polls going into election day.

RNC Chairman Reince Priebus

Republican National Committee (RNC) Chairman Reince Priebus (C) high-fives U.S. Representative Greg Walden (R-OR) (L) and an unidentified man after a news conference at RNC headquarters on Capitol Hill in Washington Nov. 4, 2014.

Republicans celebrate

Republican supporters, including John Eads (C) of Colorado Springs, Colorado, cheer as a television broadcast declares the Republicans took control of the U.S. Senate at the Colorado Republican party election night event at the Denver Tech Center Hyatt Nov. 4, 2014. Republicans picked up at least seven seats in the Senate in the mid-term elections.