skip to main content

2015 Report Cards: All Senators

These special year-end statistics dissect the legislative records of Members of Congress during the 2015 legislative year (Jan 6, 2015-Dec 31, 2015), looking at Members who served at the end of that period. This page was last updated on Jan 9, 2016.

Page Icon

 

Ideology Score

Our unique ideology analysis assigns a score to Members of Congress according to their legislative behavior by how similar the pattern of bills and resolutions they cosponsor are to other Members of Congress. The score can be interpreted as a conservative—liberal scale, although of course it only takes into account a small aspect of reality.

All Senators
most conservative
#1 1.00 Sen. James “Jim” Inhofe [R-OK]
#2 0.97 Sen. Pat Roberts [R-KS]
#3 0.95 Sen. James Risch [R-ID]
#4 0.94 Sen. John Barrasso [R-WY]
#5 0.93 Sen. Michael Crapo [R-ID]
#6 0.93 Sen. David Perdue [R-GA]
#7 0.93 Sen. Michael Enzi [R-WY]
#8 0.93 Sen. Steve Daines [R-MT]
#9 0.92 Sen. Mike Lee [R-UT]
#10 0.92 Sen. Ted Cruz [R-TX]
#11 0.91 Sen. James Lankford [R-OK]
#12 0.91 Sen. Deb Fischer [R-NE]
#13 0.90 Sen. Tom Cotton [R-AR]
#14 0.89 Sen. John “Johnny” Isakson [R-GA]
#15 0.89 Sen. John Cornyn [R-TX]
#16 0.88 Sen. Tim Scott [R-SC]
#17 0.88 Sen. Orrin Hatch [R-UT]
#18 0.87 Sen. John Thune [R-SD]
#19 0.87 Sen. Roy Blunt [R-MO]
#20 0.87 Sen. John Boozman [R-AR]
#21 0.86 Sen. Roger Wicker [R-MS]
#22 0.86 Sen. Daniel Coats [R-IN, 2011-2016]
#23 0.86 Sen. Marco Rubio [R-FL]
#24 0.85 Sen. David Vitter [R-LA, 2005-2016]
#25 0.85 Sen. John McCain [R-AZ]
#26 0.85 Sen. Jefferson “Jeff” Sessions [R-AL, 1997-2017]
#27 0.84 Sen. Ron Johnson [R-WI]
#28 0.83 Sen. Bill Cassidy [R-LA]
#29 0.83 Sen. Jerry Moran [R-KS]
#30 0.83 Sen. Mike Rounds [R-SD]
#31 0.83 Sen. Cory Gardner [R-CO]
#32 0.82 Sen. Jeff Flake [R-AZ]
#33 0.82 Sen. Joni Ernst [R-IA]
#34 0.82 Sen. Mitch McConnell [R-KY]
#35 0.82 Sen. John Hoeven [R-ND]
#36 0.81 Sen. Charles “Chuck” Grassley [R-IA]
#37 0.81 Sen. Thom Tillis [R-NC]
#38 0.80 Sen. Patrick “Pat” Toomey [R-PA]
#39 0.80 Sen. Shelley Capito [R-WV]
#40 0.79 Sen. Richard Burr [R-NC]
#41 0.79 Sen. Thad Cochran [R-MS]
#42 0.79 Sen. Rand Paul [R-KY]
#43 0.77 Sen. Lamar Alexander [R-TN]
#44 0.76 Sen. Benjamin Sasse [R-NE]
#45 0.76 Sen. Dan Sullivan [R-AK]
#46 0.74 Sen. Richard Shelby [R-AL]
#47 0.72 Sen. Kelly Ayotte [R-NH, 2011-2016]
#48 0.72 Sen. Robert “Rob” Portman [R-OH]
#49 0.72 Sen. Lindsey Graham [R-SC]
#50 0.72 Sen. Dean Heller [R-NV]
#51 0.71 Sen. Bob Corker [R-TN]
#52 0.63 Sen. Lisa Murkowski [R-AK]
#53 0.60 Sen. Mark Kirk [R-IL, 2010-2016]
#54 0.59 Sen. Heidi Heitkamp [D-ND]
#55 0.57 Sen. Joe Manchin [D-WV]
#56 0.51 Sen. Joe Donnelly [D-IN]
#57 0.47 Sen. Mark Warner [D-VA]
#58 0.45 Sen. Susan Collins [R-ME]
#59 0.42 Sen. Bill Nelson [D-FL]
#60 0.42 Sen. Thomas Carper [D-DE]
#61 0.41 Sen. Michael Bennet [D-CO]
#62 0.41 Sen. Angus King [I-ME]
#63 0.40 Sen. Jon Tester [D-MT]
#64 0.38 Sen. Claire McCaskill [D-MO]
#65 0.33 Sen. Tom Udall [D-NM]
#66 0.32 Sen. Timothy Kaine [D-VA]
#67 0.28 Sen. Chris Coons [D-DE]
#68 0.28 Sen. Robert “Bob” Casey [D-PA]
#69 0.26 Sen. Ron Wyden [D-OR]
#70 0.25 Sen. Amy Klobuchar [D-MN]
#71 0.25 Sen. Maria Cantwell [D-WA]
#72 0.24 Sen. Harry Reid [D-NV, 1987-2016]
#73 0.24 Sen. Martin Heinrich [D-NM]
#74 0.23 Sen. Benjamin Cardin [D-MD]
#75 0.22 Sen. Jeanne Shaheen [D-NH]
#76 0.22 Sen. Cory Booker [D-NJ]
#77 0.19 Sen. Gary Peters [D-MI]
#78 0.19 Sen. Patrick Leahy [D-VT]
#79 0.19 Sen. Robert “Bob” Menéndez [D-NJ]
#80 0.16 Sen. Christopher Murphy [D-CT]
#81 0.16 Sen. Brian Schatz [D-HI]
#82 0.15 Sen. Debbie Stabenow [D-MI]
#83 0.14 Sen. Dianne Feinstein [D-CA]
#84 0.14 Sen. Barbara Mikulski [D-MD, 1987-2016]
#85 0.12 Sen. Charles “Chuck” Schumer [D-NY]
#86 0.12 Sen. Sherrod Brown [D-OH]
#87 0.11 Sen. Mazie Hirono [D-HI]
#88 0.11 Sen. Patty Murray [D-WA]
#89 0.09 Sen. Jeff Merkley [D-OR]
#90 0.08 Sen. Kirsten Gillibrand [D-NY]
#91 0.08 Sen. Richard Blumenthal [D-CT]
#92 0.07 Sen. John “Jack” Reed [D-RI]
#93 0.07 Sen. Barbara Boxer [D-CA, 1993-2016]
#94 0.07 Sen. Tammy Baldwin [D-WI]
#95 0.07 Sen. Richard Durbin [D-IL]
#96 0.07 Sen. Sheldon Whitehouse [D-RI]
#97 0.05 Sen. Alan “Al” Franken [D-MN]
#98 0.04 Sen. Bernard “Bernie” Sanders [I-VT]
#99 0.03 Sen. Edward “Ed” Markey [D-MA]
#100 0.00 Sen. Elizabeth Warren [D-MA]
Export to CSV...

For more, see our methodology. An ideology score is not computed for Members of Congress who introduced fewer than 10 bills or who have a low leadership score, as there is usually not enough data in these cases to compute reliable statistics. Note that because on this page only legislative activity in 2015 is considered, the ideology score here may differ from those elsewhere on GovTrack.

Additional Notes

The Speaker’s Votes: Missed votes are not computed for the Speaker of the House. According to current House rules, the Speaker of the House is not required to vote in “ordinary legislative proceedings.” In practice this means the Speaker of the House rarely votes but is not considered absent.

Leadership/Ideology: The leadership and ideology scores are not displayed for Members of Congress who introduced fewer than 10 bills, or, for ideology, for Members of Congress that have a low leadership score, as there is usually not enough data in these cases to compute reliable leadership and ideology statistics.

Ranking Members (RkMembs): The chair of a committee is always selected from the political party that holds the most seats in the chamber, called the “majority party”. The “ranking member” (sometimes “RkMembs”) is the title given to the senior-most member of the committee not in the majority party.

Freshmen/Sophomores: Freshmen and sophomores are Members of Congress whose first term (in the same chamber at the end of 2015) was the 114th Congress (freshmen) or 113th (sophomores). Members of Congress who took office within the last few months of a Congress are considered freshmen in the next Congress as well.