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Senate Overview|By Jennifer Duffy, April 29, 2016

MARYLAND SENATE: The biggest battle in the race to succeed retiring Democratic Sen. Barbara Mikulski was the Democratic primary. U.S. Rep. Chris Van Hollen won the nomination with 53 percent to 39 percent for U.S. Rep. Donna Edwards. Eight other candidates split the remaining 8 percent. Van Hollen’s margin of victory belies how bitter this race really became in the final weeks, though he...

Pennsylvania Senate|By Jennifer Duffy, April 22, 2016

Next Tuesday, voters will witness something that has become as rare as a total solar eclipse: a very competitive Democratic Senate primary in a race that matters. Former U.S. Rep. Joe Sestak, Katie McGinty, who was most recently chief of staff to Gov. Tom Wolf, Braddock Mayor John Fetterman, and businessman Joe Vadvarka are vying for the nomination to take on GOP U.S. Sen. Pat Toomey in the...

Senate Overview|By Jennifer Duffy, March 25, 2016

Not all rating changes are created equal. Some changes happen when a first-tier candidate gets into a race and instantly makes it more competitive. Others occur because an incumbent retires, rendering the open seat more vulnerable.

Nevada Senate|By Jennifer Duffy, March 25, 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 has tried to anoint his successor by throwing his support to former state Attorney General Catherine Cortez Masto. The Republican field quickly solidified once Gov. Brian Sandoval announced, as expected, that he would not run. U.S. Rep....

Senate Overview|By Jennifer Duffy, March 18, 2016

Georgia: In 2014, Democrats believed that Georgia was one red state that they could turn blue. They had a very strong nominee in former Points of Light Foundation CEO Michelle Nunn and Republicans hosted a crowded primary and contentious run-off before nominating businessman David Perdue. Nunn couldn’t survive the midterm tide and Perdue won the race with 53 percent. While Democrats perform...

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 1 7 24 11
Republicans (54) 24 6 1 6 11 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 01:24 PM, Apr 28
  • Race Ratings
    The Cook Political Report's latest ratings for all competitive and potentially competitive Senate seats.
    Updated 05:53 AM, Mar 25
  • 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 02:31 PM, Feb 11
  • 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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