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2013 Report Cards
Senate Democrats / Cosponsors

These special year-end statistics dissect the legislative records of Members of Congress during the 2013 legislative year (Jan 3, 2013-Dec 26, 2013), looking at Members who served at the end of that period. This page was last updated on Dec 1, 2014.

A higher or lower number below doesn’t necessarily make a legislator any better or worse, or more or less effective, than other Members of Congress. We present these statistics for you to understand the quantitative aspects of legislating and make your own judgements based on what legislative activities you think are important.

Keep in mind that there are many important aspects of being a legislator besides what can be measured, such as constituent services and performing oversight of the executive branch, which aren’t reflected here.

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The total number of cosponsors joining the bills written by each legislator in 2013.

Senate Democrats
most cosponsors
#1 591 Sen. Edward “Ed” Markey [D-MA]
#2 514 Sen. Robert “Bob” Menendez [D-NJ]
#3 384 Sen. Thomas “Tom” Harkin [D-IA, 1985-2014]
#4 343 Sen. Sherrod Brown [D-OH]
#5 339 Sen. Harry Reid [D-NV, 1987-2016]
#6 303 Sen. Mary Landrieu [D-LA, 1997-2014]
#7 290 Sen. Robert “Bob” Casey [D-PA]
#8 280 Sen. Benjamin Cardin [D-MD]
#9 273 Sen. John “Jack” Reed [D-RI]
#10 269 Sen. Jon Tester [D-MT]
#11 257 Sen. Amy Klobuchar [D-MN]
#12 249 Sen. Barbara Boxer [D-CA, 1993-2016]
#13 239 Sen. Elizabeth Warren [D-MA]
#14 231 Sen. Richard Durbin [D-IL]
#15 226 Sen. Patrick Leahy [D-VT]
#16 223 Sen. Richard Blumenthal [D-CT]
#17 216 Sen. Alan “Al” Franken [D-MN, 2009-2017]
#17 216 Sen. Charles “Chuck” Schumer [D-NY]
#19 202 Sen. Ron Wyden [D-OR]
#20 198 Sen. Mark Warner [D-VA]
#21 197 Sen. Kirsten Gillibrand [D-NY]
#21 197 Sen. Bill Nelson [D-FL, 2001-2018]
#23 195 Sen. Max Baucus [D-MT, 1978-2014]
#24 180 Sen. Thomas Carper [D-DE]
#25 172 Sen. Dianne Feinstein [D-CA]
#26 162 Sen. Patty Murray [D-WA]
#27 150 Sen. Jeanne Shaheen [D-NH]
#28 147 Sen. John “Jay” Rockefeller [D-WV, 1985-2014]
#29 145 Sen. Debbie Stabenow [D-MI]
#30 136 Sen. Jeff Merkley [D-OR]
#31 121 Sen. Mark Begich [D-AK, 2009-2014]
#32 118 Sen. Mark Pryor [D-AR, 2003-2014]
#33 116 Sen. Mark Udall [D-CO, 2009-2014]
#34 113 Sen. Tom Udall [D-NM]
#35 108 Sen. Sheldon Whitehouse [D-RI]
#36 96 Sen. Maria Cantwell [D-WA]
#37 93 Sen. Carl Levin [D-MI, 1979-2014]
#38 89 Sen. Joe Manchin [D-WV]
#39 87 Sen. Kay Hagan [D-NC, 2009-2014]
#40 76 Sen. Claire McCaskill [D-MO, 2007-2018]
#41 72 Sen. Barbara Mikulski [D-MD, 1987-2016]
#42 61 Sen. Chris Coons [D-DE]
#43 54 Sen. Mazie Hirono [D-HI]
#44 52 Sen. Michael Bennet [D-CO]
#45 48 Sen. Heidi Heitkamp [D-ND, 2013-2018]
#46 46 Sen. Timothy “Tim” Kaine [D-VA]
#47 36 Sen. Joe Donnelly [D-IN, 2013-2018]
#48 32 Sen. Brian Schatz [D-HI]
#49 30 Sen. Tim Johnson [D-SD, 1997-2014]
#50 29 Sen. Christopher Murphy [D-CT]
#51 19 Sen. Tammy Baldwin [D-WI]
#52 13 Sen. Martin Heinrich [D-NM]
#53 0 Sen. Cory Booker [D-NJ]
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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 2013) was the 113th Congress (freshmen) or 112th (sophomores). Members of Congress who took office within the last few months of a Congress are considered freshmen in the next Congress as well.