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Senate Overview|By Jennifer Duffy, May 20, 2016

Kentucky Senate: Republican U.S. Sen. Rand Paul’s failed presidential run undoubtedly feels like a political lifetime ago. And, although he won’t rule out the possibility of another presidential run in 2020, Paul is now fully focused on his race for a second term in the Senate. He easily defeated two little known opponents in the May 17 primary, taking 85 percent of the vote. Democrats have...

Indiana Senate|By Jennifer Duffy, May 6, 2016

Republicans are currently favored to hold on to this seat being vacated by Sen. Dan Coats at the end of this Congress, but Democrats hope that having Donald Trump at the top of the GOP ticket can make it more competitive than it should be. U.S. Rep. Todd Young easily won the Republican Senate nomination, defeating U.S. Rep. Marlin Stutzman, 67 percent to 33 percent. On the Democratic side,...

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.

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 03:48 PM, May 19
  • 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 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.
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