United States Senate elections, 2016 (We Can Do Better)

Elections for the United States Senate were held on November 8, 2016, with 34 of the 100 seats in the Senate being contested in regular elections, the winners of which will serve six-year terms in the United States Congress until January 3, 2023. All class 3 Senators were up for election; class 3 was last up for election in 2010, when Republicans won a net gain of 8 seats. Democrats defended 14 seats, while Republicans defended 20 seats. The 2014 elections saw the Republicans make huge gains, with the Democrats narrowly maintaining their majority by 1 seat. In 2016, Democrats won a net gain of four seats, with the possibility of one more pickup depending on the winner of the Senate race in Louisiana. Democrats will retain control of the Senate for the 115th United States Congress. Four incumbents lost their seats, Kelly Ayotte of New Hampshire, Mark Kirk of Illinois, Pat Toomey of Pennsylvania, Roy Blunt of Missouri, and Ron Johnson of Wisconsin, all Republicans, to Maggie Hassan, Tammy Duckworth, Katie McGinty, Jason Kander, and Russ Feingold respectively.

The 2016 presidential election, 2016 House elections, 2016 gubernatorial elections, and many state and local elections were also held on this date.

Change in composition
Key:

Election results
Incumbents are underlined. Winners are in bold.
 * Alabama: Richard Shelby vs Ron Crumpton
 * Alaska: Lisa Murkowski vs Ray Metcalfe
 * Arizona: J. D. Hayworth  vs Ann Kirkpatrick
 * Arkansas: Blanche Lincoln vs Jim Holt
 * California: Kamala Harris vs Lorreta Sanchez
 * Colorado: Michael Bennet vs Darryl Glenn
 * Connecticut: Richard Blumenthal vs Dan Carter
 * Florida: Marco Rubio vs Patrick Murphy
 * Georgia: Johnny Isakson vs Jim Barksdale
 * Hawaii: Brian Schatz vs John Carroll
 * Idaho: Mike Crapo vs Jerry Sturgill
 * Illinois: Tammy Duckworth vs Mark Kirk
 * Indiana: Todd Young vs Baron Hill
 * Iowa: Chuck Grassley vs Patty Judge
 * Kansas: Jerry Moran vs Patrick Wiesner
 * Kentucky: Rand Paul vs Jim Gray
 * Lousiana: Foster Campbell vs John Kennedy
 * Maryland: Chris Van Hollen vs Kathy Szeliga
 * Missouri: Jason Kander vs Roy Blunt
 * Nevada: Catherine Cortez Masto vs Joe Heck
 * New Hampshire: Maggie Hassan vs Kelly Ayotte
 * New York: Kirsten Gillibrand vs Wendy Long
 * North Carolina: John Edwards vs Greg Brannon
 * North Dakota: John Hoeven vs Eliot Glassheim
 * Ohio: Rob Portman vs Ted Strickland
 * Oklahoma: James Lankford vs Mike Workman
 * Oregon: Ron Wyden vs Mark Callahan
 * Pennsylvania: Katie McGinty vs Pat Toomey
 * South Carolina: Tim Scott vs Thomas Dixon
 * South Dakota: Tom Daschle vs Stace Nelson
 * Utah: Mike Lee vs Misty K. Snow
 * Vermont: Patrick Leahy vs Scott Milne
 * Washington: Patty Murray vs Chris Vance
 * Wisconsin: Russ Feingold vs Ron Johnson