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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.

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Joining Bipartisan Bills

In this era of partisanship, it is encouraging to see Members of Congress working across the aisle. This is the percent of bills cosponsored by each legislator which were introduced by a member of the other party.

All Senators
most often
#1 61.3% Sen. Joe Manchin [D-WV]
#10 43.3% Sen. Claire McCaskill [D-MO]
#11 41.8% Sen. Chris Coons [D-DE]
#12 41.7% Sen. Mark Kirk [R-IL, 2010-2016]
#13 40.2% Sen. Benjamin Cardin [D-MD]
#14 39.9% Sen. Amy Klobuchar [D-MN]
#15 39.8% Sen. Maria Cantwell [D-WA]
#16 39.6% Sen. Jeanne Shaheen [D-NH]
#17 39.1% Sen. Robert “Bob” Casey [D-PA]
#18 37.6% Sen. Robert “Rob” Portman [R-OH]
#19 35.6% Sen. Tom Udall [D-NM]
#2 59.1% Sen. Joe Donnelly [D-IN]
#20 34.7% Sen. Gary Peters [D-MI]
#21 34.2% Sen. Lisa Murkowski [R-AK]
#22 33.6% Sen. Timothy Kaine [D-VA]
#23 33.5% Sen. Ron Wyden [D-OR]
#24 33.5% Sen. Kelly Ayotte [R-NH, 2011-2016]
#25 33.2% Sen. Martin Heinrich [D-NM]
#26 33.0% Sen. Harry Reid [D-NV, 1987-2016]
#27 32.4% Sen. Dean Heller [R-NV]
#28 32.0% Sen. Patrick Leahy [D-VT]
#29 31.6% Sen. Debbie Stabenow [D-MI]
#3 57.4% Sen. Heidi Heitkamp [D-ND]
#30 31.5% Sen. Brian Schatz [D-HI]
#31 30.9% Sen. Christopher Murphy [D-CT]
#32 30.7% Sen. Charles “Chuck” Schumer [D-NY]
#33 30.5% Sen. Dianne Feinstein [D-CA]
#34 29.9% Sen. Cory Booker [D-NJ]
#35 29.5% Sen. Shelley Capito [R-WV]
#36 29.5% Sen. Lindsey Graham [R-SC]
#37 29.4% Sen. Robert “Bob” Menéndez [D-NJ]
#38 29.2% Sen. Sherrod Brown [D-OH]
#39 28.5% Sen. Charles “Chuck” Grassley [R-IA]
#4 52.5% Sen. Michael Bennet [D-CO]
#40 27.8% Sen. Patrick “Pat” Toomey [R-PA]
#41 27.8% Sen. Marco Rubio [R-FL]
#42 27.6% Sen. Richard Durbin [D-IL]
#43 27.2% Sen. Alan “Al” Franken [D-MN, 2009-2017]
#44 27.2% Sen. Tammy Baldwin [D-WI]
#45 27.1% Sen. Richard Blumenthal [D-CT]
#46 27.0% Sen. Barbara Mikulski [D-MD, 1987-2016]
#47 26.8% Sen. Kirsten Gillibrand [D-NY]
#47 26.8% Sen. Mazie Hirono [D-HI]
#49 26.2% Sen. Roy Blunt [R-MO]
#5 51.4% Sen. Susan Collins [R-ME]
#50 25.6% Sen. Patty Murray [D-WA]
#51 25.4% Sen. Richard Burr [R-NC]
#52 25.4% Sen. Edward “Ed” Markey [D-MA]
#53 24.7% Sen. Jerry Moran [R-KS]
#54 24.4% Sen. Ron Johnson [R-WI]
#55 24.2% Sen. Jeff Merkley [D-OR]
#56 24.1% Sen. Rand Paul [R-KY]
#57 23.3% Sen. Sheldon Whitehouse [D-RI]
#58 22.8% Sen. Roger Wicker [R-MS]
#59 22.8% Sen. Thad Cochran [R-MS, 1979-2018]
#6 50.0% Sen. Bill Nelson [D-FL]
#60 22.6% Sen. Barbara Boxer [D-CA, 1993-2016]
#61 22.6% Sen. Thom Tillis [R-NC]
#62 22.2% Sen. Cory Gardner [R-CO]
#63 22.0% Sen. John Boozman [R-AR]
#64 21.8% Sen. Dan Sullivan [R-AK]
#65 21.8% Sen. John “Jack” Reed [D-RI]
#66 21.7% Sen. John Hoeven [R-ND]
#67 20.8% Sen. Steve Daines [R-MT]
#68 20.8% Sen. Bob Corker [R-TN]
#69 20.7% Sen. David Vitter [R-LA, 2005-2016]
#7 49.7% Sen. Mark Warner [D-VA]
#70 20.2% Sen. Mike Rounds [R-SD]
#71 20.0% Sen. John “Johnny” Isakson [R-GA]
#72 19.9% Sen. Elizabeth Warren [D-MA]
#73 19.4% Sen. Joni Ernst [R-IA]
#74 18.9% Sen. Jeff Flake [R-AZ]
#75 18.7% Sen. Tom Cotton [R-AR]
#76 18.7% Sen. John McCain [R-AZ, 1987-2018]
#77 18.0% Sen. John Cornyn [R-TX]
#78 17.8% Sen. Orrin Hatch [R-UT]
#79 17.7% Sen. Michael Crapo [R-ID]
#8 47.2% Sen. Jon Tester [D-MT]
#80 17.2% Sen. Lamar Alexander [R-TN]
#81 16.4% Sen. Bill Cassidy [R-LA]
#82 16.1% Sen. Pat Roberts [R-KS]
#83 16.1% Sen. John Thune [R-SD]
#84 15.5% Sen. Daniel Coats [R-IN, 2011-2016]
#85 15.4% Sen. Benjamin Sasse [R-NE]
#86 15.0% Sen. Tim Scott [R-SC]
#87 14.7% Sen. Jefferson “Jeff” Sessions [R-AL, 1997-2017]
#88 14.5% Sen. Mitch McConnell [R-KY]
#89 14.5% Sen. James Risch [R-ID]
#9 44.8% Sen. Thomas Carper [D-DE]
#90 14.3% Sen. James Lankford [R-OK]
#90 14.3% Sen. Richard Shelby [R-AL]
#92 14.2% Sen. Deb Fischer [R-NE]
#93 14.0% Sen. David Perdue [R-GA]
#94 13.0% Sen. Michael Enzi [R-WY]
#95 11.7% Sen. Ted Cruz [R-TX]
#96 11.6% Sen. James “Jim” Inhofe [R-OK]
#97 10.9% Sen. Mike Lee [R-UT]
#98 9.7% Sen. John Barrasso [R-WY]
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Only Democratic and Republican Members of Congress who cosponsored more than 10 bills and resolutions are included in this statistic.

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.

Missing Bills: We exclude bills from some statistics where the sponsor’s original intent is not in the final bill because the bill’s text was replaced in whole with unrelated provisions (i.e. it became a vehicle for passage of unrelated provisions).

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.