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California Senate|By Jennifer Duffy, January 16, 2015

There is no official starting gun in an election cycle. Some believe that it’s the day after the last election, while others tend to look at January 1. At least symbolically, though, a new election cycle for the U.S. Senate might just begin with the first announcement by an incumbent that he/she won’t seek re-election.

Senate Overview|By Jennifer Duffy, December 12, 2014

As any truly seasoned political strategist knows, political parties have good election cycles and bad election cycles. A party can have a favorable political environment, a good electoral map, and few vulnerable seats that enables them to pick up seats and perhaps even the majority one year only to face exactly the opposite set of circumstances two years later. This reversal of fortune will...

Kansas Senate|By Jennifer Duffy, December 5, 2014

There are a lot of 2014 Senate campaigns that deserve praise, including Republican Cory Gardner’s defeat of Democratic Sen. Mark Udall in Colorado, and Sen. Mitch McConnell’s 15-point victory over Democratic Secretary of State Alison Lundergan Grimes in Kentucky. There is one race, though, that should be singled out for a number of reasons, and that is GOP Sen. Pat Roberts’ campaign in Kansas...

Louisiana Senate|December 5, 2014

A rundown of recent public opinion polling ahead of the December 6, 2014 Louisiana Senate runoff election between Democratic Sen. Mary Landrieu and GOP Rep. Bill Cassidy.

Louisiana Senate|By Jennifer Duffy, November 21, 2014

In the weeks leading up to November 4, we were often asked what the inevitable runoff in the Louisiana Senate race would look like. Our answer was that regardless of what happened nationally on Election Day, the December 6 runoff between Democratic Sen. Mary Landrieu and GOP U.S. Rep. Bill Cassidy would be a whole new race. Whatever had transpired in the months leading up to November 4...

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 0 2 1 7 24 11
Republicans (54) 24 0 5 6 13 8 22
Toss Up Lean R Likely R Solid R

Senate Race Ratings Map

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  • 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 03:36 PM, Jan 22
  • Race Ratings
    The Cook Political Report's latest ratings for all competitive and potentially competitive Senate seats.
    Updated 10:23 AM, Jan 9
  • 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 10:43 AM, Dec 1
  • 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.
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