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2015 Report Cards
Senate Republicans / Cosponsors

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.

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 2015.

Senate Republicans
most cosponsors
#1 579 Sen. McConnell [R-KY]
#2 457 Sen. Grassley [R-IA]
#3 382 Sen. Hatch [R-UT]
#4 363 Sen. Vitter [R-LA]
#5 300 Sen. Blunt [R-MO]
#6 293 Sen. Cornyn [R-TX]
#7 272 Sen. Lee [R-UT]
#8 269 Sen. Barrasso [R-WY]
#9 267 Sen. Ayotte [R-NH]
#10 264 Sen. Collins [R-ME]
#11 260 Sen. Moran [R-KS]
#12 258 Sen. Corker [R-TN]
#13 257 Sen. Thune [R-SD]
#14 250 Sen. Alexander [R-TN]
#15 246 Sen. Kirk [R-IL]
#16 232 Sen. Portman [R-OH]
#17 219 Sen. Rubio [R-FL]
#18 215 Sen. Flake [R-AZ]
#19 202 Sen. Scott [R-SC]
#20 178 Sen. Heller [R-NV]
#21 173 Sen. Inhofe [R-OK]
#22 166 Sen. Paul [R-KY]
#23 165 Sen. Toomey [R-PA]
#24 158 Sen. Cruz [R-TX]
#25 153 Sen. Crapo [R-ID]
#26 147 Sen. Wicker [R-MS]
#27 144 Sen. Johnson [R-WI]
#28 138 Sen. Isakson [R-GA]
#29 128 Sen. Roberts [R-KS]
#30 126 Sen. Ernst [R-IA]
#31 124 Sen. Enzi [R-WY]
#32 122 Sen. Hoeven [R-ND]
#33 120 Sen. Fischer [R-NE]
#34 116 Sen. Sessions [R-AL]
#35 107 Sen. Burr [R-NC]
#36 106 Sen. Capito [R-WV]
#37 102 Sen. Boozman [R-AR]
#38 101 Sen. Murkowski [R-AK]
#39 88 Sen. McCain [R-AZ]
#40 85 Sen. Graham [R-SC]
#41 71 Sen. Cassidy [R-LA]
#42 54 Sen. Gardner [R-CO]
#43 44 Sen. Lankford [R-OK]
#44 41 Sen. Sasse [R-NE]
#45 40 Sen. Risch [R-ID]
#46 35 Sen. Daines [R-MT]
#47 33 Sen. Cochran [R-MS]
#48 30 Sen. Sullivan [R-AK]
#49 29 Sen. Coats [R-IN]
#49 29 Sen. Cotton [R-AR]
#51 27 Sen. Rounds [R-SD]
#52 17 Sen. Perdue [R-GA]
#53 15 Sen. Tillis [R-NC]
#54 10 Sen. Shelby [R-AL]
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Additional Notes

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.