Jump to Any Race
Nevada Senate|By Jennifer Duffy, June 17, 2016

This open seat where Senate Democratic Leader Harry Reid is retiring after five terms is Republicans’ best opportunity to pick up a Democratic-held seat. Reid hopes he anointed his successor when he threw his support to former state Attorney General Catherine Cortez Masto, who pulled just nominal primary opposition and won the nomination with 81 percent. The Republican field quickly solidified...

Senate Overview|By Jennifer Duffy, June 10, 2016

For down ballot races, there is nothing more certain about this election cycle than its uncertainty. This is a cycle without precedent. As the presidential primary contests for both parties demonstrated, history and experience proved only marginally useful in analyzing and trying to predict outcomes.

Senate Overview|By Jennifer Duffy, June 10, 2016

California Senate: Revised Bottom Line

Alaska Senate|By Jennifer Duffy, June 3, 2016

In 2010, GOP Sen. Lisa Murkowski won re-election to a second full term as a write-in candidate after losing the primary to Tea Party candidate Joe Miller. She took 39 percent to 35 percent for Miller and 23 percent for Democrat Scott McAdams. As she gears up to run for another term, Murkowski will again face a credible primary opponent. Former Anchorage Mayor Dan Sullivan filed his candidacy...

Senate Overview|By Jennifer Duffy, May 27, 2016

As the end of another month approaches, so does the deluge of emails from candidates and campaign committees in search of contributions. This torrent of missives begging for $5 or $10 used to come only toward the end of the quarter, but there are now mid-quarter and monthly deadlines, making the pace relentless to the point that there are candidates who send one or two fundraising emails...

Senate Dashboard

Seats Up in 2016 Toss Up Lean D Likely D Solid D Seats Up in 2018 Seats Up in 2020
Democrats (45) 10 1 1 0 8 24 11
Republicans (54) 24 6 1 6 11 8 22
Toss Up Lean R Likely R Solid R

Senate Race Ratings Map

Interactive Map


  • At-A-Glance
    A listing of candidates and race ratings in all current Senate races. Updated weekly and printable for on-the-run reference.
    Updated 03:49 PM, Jun 23
  • Race Ratings
    The Cook Political Report's latest ratings for all competitive and potentially competitive Senate seats.
    Updated 01:41 PM, Jun 22
  • General Election Polls
    A selection of public opinion polling in Senate general election contests across the nation.
  • Primary Trial Heats
    A selection of public opinion polling in Senate primary election contests across the nation.
    Updated 08:00 AM, Sep 12
  • FEC Report
    A summary of key financial information filed by Senate candidates with the Federal Election Commission.
    Updated 05:52 AM, May 13
  • 2014 Battleground Chart
    2014 Senate Races: Romney Performance vs. Obama Performance
    November 12, 2012
  • 2012 Senate General Election Polls with Final Results
    A collection of polling data from the 2012 cycle, with final general election results included.
  • Two-Term Presidents: Post-WWII Partisan Trends
    Opposing party gains under and following second term presidents.
  • Senate Scatterplot
    The Cook Political Report Senate Scatterplot for Republican and Democratic held states by win percentage and PVI.
  • Senate: 2014 55% and Under Charts
    The chart below displays Senators up for reelection in 2014 who won with less than 55% of the vote in 2008.

Jennifer Duffy, Senior Editor

Jennifer Duffy is Senior Editor for The Cook Political Report, where she is responsible for U.S. Senate and Governors races.
Read More »