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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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Powerful Cosponsors

The number of bills that each legislator introduced in 2015 that had a cosponsor who was a chair or ranking member of a committee that the bill was referred to. Getting support from committee leaders on relevant committees is a crucial step in moving legislation forward.

All Senators
most often
#1 12 Sen. John Thune [R-SD]
#11 7 Sen. Benjamin Cardin [D-MD]
#11 7 Sen. Orrin Hatch [R-UT]
#13 6 Sen. Alan “Al” Franken [D-MN, 2009-2017]
#13 6 Sen. Bob Corker [R-TN]
#13 6 Sen. Jeanne Shaheen [D-NH]
#16 5 Sen. David Vitter [R-LA, 2005-2016]
#16 5 Sen. Deb Fischer [R-NE]
#16 5 Sen. Lamar Alexander [R-TN]
#16 5 Sen. Patty Murray [D-WA]
#16 5 Sen. Richard Blumenthal [D-CT]
#16 5 Sen. Robert “Bob” Casey [D-PA]
#16 5 Sen. Robert “Bob” Menéndez [D-NJ]
#16 5 Sen. Robert “Rob” Portman [R-OH]
#16 5 Sen. Ron Johnson [R-WI]
#16 5 Sen. Roy Blunt [R-MO]
#16 5 Sen. Ted Cruz [R-TX]
#2 10 Sen. Charles “Chuck” Grassley [R-IA]
#2 10 Sen. Dianne Feinstein [D-CA]
#2 10 Sen. John Barrasso [R-WY]
#27 4 Sen. Amy Klobuchar [D-MN]
#27 4 Sen. Barbara Boxer [D-CA, 1993-2016]
#27 4 Sen. Barbara Mikulski [D-MD, 1987-2016]
#27 4 Sen. Christopher Murphy [D-CT]
#27 4 Sen. Cory Gardner [R-CO]
#27 4 Sen. Edward “Ed” Markey [D-MA]
#27 4 Sen. Jerry Moran [R-KS]
#27 4 Sen. Kelly Ayotte [R-NH, 2011-2016]
#27 4 Sen. Lisa Murkowski [R-AK]
#27 4 Sen. Maria Cantwell [D-WA]
#27 4 Sen. Sherrod Brown [D-OH]
#27 4 Sen. Susan Collins [R-ME]
#27 4 Sen. Tammy Baldwin [D-WI]
#40 3 Sen. Bernard “Bernie” Sanders [I-VT]
#40 3 Sen. Cory Booker [D-NJ]
#40 3 Sen. Dan Sullivan [R-AK]
#40 3 Sen. James “Jim” Inhofe [R-OK]
#40 3 Sen. John Boozman [R-AR]
#40 3 Sen. John “Johnny” Isakson [R-GA]
#40 3 Sen. Jon Tester [D-MT]
#40 3 Sen. Mark Kirk [R-IL, 2010-2016]
#40 3 Sen. Michael Crapo [R-ID]
#40 3 Sen. Pat Roberts [R-KS]
#40 3 Sen. Patrick Leahy [D-VT]
#40 3 Sen. Roger Wicker [R-MS]
#40 3 Sen. Ron Wyden [D-OR]
#5 9 Sen. Mike Lee [R-UT]
#5 9 Sen. Richard Durbin [D-IL]
#53 2 Sen. Bill Cassidy [R-LA]
#53 2 Sen. Charles “Chuck” Schumer [D-NY]
#53 2 Sen. Chris Coons [D-DE]
#53 2 Sen. Dean Heller [R-NV]
#53 2 Sen. Elizabeth Warren [D-MA]
#53 2 Sen. Heidi Heitkamp [D-ND]
#53 2 Sen. James Lankford [R-OK]
#53 2 Sen. James Risch [R-ID]
#53 2 Sen. Jeff Merkley [D-OR]
#53 2 Sen. John Hoeven [R-ND]
#53 2 Sen. John McCain [R-AZ, 1987-2018]
#53 2 Sen. John “Jack” Reed [D-RI]
#53 2 Sen. Kirsten Gillibrand [D-NY]
#53 2 Sen. Lindsey Graham [R-SC]
#53 2 Sen. Michael Enzi [R-WY]
#53 2 Sen. Mitch McConnell [R-KY]
#53 2 Sen. Patrick “Pat” Toomey [R-PA]
#53 2 Sen. Rand Paul [R-KY]
#53 2 Sen. Richard Burr [R-NC]
#53 2 Sen. Sheldon Whitehouse [D-RI]
#53 2 Sen. Shelley Capito [R-WV]
#53 2 Sen. Tim Scott [R-SC]
#53 2 Sen. Tom Udall [D-NM]
#7 8 Sen. Jeff Flake [R-AZ]
#7 8 Sen. John Cornyn [R-TX]
#7 8 Sen. Marco Rubio [R-FL]
#7 8 Sen. Thomas Carper [D-DE]
#76 1 Sen. Benjamin Sasse [R-NE]
#76 1 Sen. Brian Schatz [D-HI]
#76 1 Sen. Daniel Coats [R-IN, 2011-2016]
#76 1 Sen. Harry Reid [D-NV, 1987-2016]
#76 1 Sen. Jefferson “Jeff” Sessions [R-AL, 1997-2017]
#76 1 Sen. Joe Donnelly [D-IN]
#76 1 Sen. Mark Warner [D-VA]
#76 1 Sen. Mazie Hirono [D-HI]
#76 1 Sen. Michael Bennet [D-CO]
#85 0 Sen. Angus King [I-ME]
#85 0 Sen. Bill Nelson [D-FL]
#85 0 Sen. Claire McCaskill [D-MO]
#85 0 Sen. David Perdue [R-GA]
#85 0 Sen. Debbie Stabenow [D-MI]
#85 0 Sen. Gary Peters [D-MI]
#85 0 Sen. Joe Manchin [D-WV]
#85 0 Sen. Joni Ernst [R-IA]
#85 0 Sen. Martin Heinrich [D-NM]
#85 0 Sen. Mike Rounds [R-SD]
#85 0 Sen. Richard Shelby [R-AL]
#85 0 Sen. Steve Daines [R-MT]
#85 0 Sen. Thad Cochran [R-MS, 1979-2018]
#85 0 Sen. Thom Tillis [R-NC]
#85 0 Sen. Timothy Kaine [D-VA]
#85 0 Sen. Tom Cotton [R-AR]
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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.