Most Conservative U.S. Senators of 2023

The top-ranked U.S. Senators by 2023 ILA scorecard score, based on substantive votes tracked by Institute for Legislative Analysis.

See the methodology page for how scores are calculated.

Rank	Lawmaker	Party / State / District	2023 Score
1	Sen. Mike Lee	R-UT	100%
2	Sen. Rand Paul	R-KY	98%
3	Sen. Mike Braun	R-IN	93%
4	Sen. Tommy Tuberville	R-AL	93%
5	Sen. Eric Schmitt	R-MO	91%
6	Sen. Ron Johnson	R-WI	89%
7	Sen. Jim Banks	R-IN	89%
8	Sen. Marsha Blackburn	R-TN	87%
9	Sen. J.D. Vance	R-OH	87%
10	Sen. Roger Marshall	R-KS	86%
11	Sen. Rick Scott	R-FL	86%
12	Sen. Cynthia Lummis	R-WY	85%
13	Sen. Bill Hagerty	R-TN	85%
14	Sen. Joshua Hawley	R-MO	84%
15	Sen. Ted Cruz	R-TX	83%
16	Sen. Steve Daines	R-MT	82%
17	Sen. John Barrasso	R-WY	82%
18	Sen. Deb Fischer	R-NE	80%
19	Sen. Ted Budd	R-NC	80%
20	Sen. John Kennedy	R-LA	78%
21	Sen. John Cornyn	R-TX	77%
22	Sen. James Lankford	R-OK	77%
23	Sen. John Hoeven	R-ND	77%
24	Sen. Charles Grassley	R-IA	77%
25	Sen. Dan Sullivan	R-AK	77%
26	Sen. Katie Britt	R-AL	76%
27	Sen. Kevin Cramer	R-ND	76%
28	Sen. Michael Crapo	R-ID	76%
29	Sen. Joni Ernst	R-IA	75%
30	Sen. Marco Rubio	R-FL	75%
31	Sen. Jim Risch	R-ID	74%
32	Sen. John Curtis	R-UT	74%
33	Sen. Tom Cotton	R-AR	73%
34	Sen. Peter Ricketts	R-NE	71%
35	Sen. John Thune	R-SD	71%
36	Sen. Markwayne Mullin	R-OK	71%
37	Sen. Cindy Hyde-Smith	R-MS	70%
38	Sen. Jerry Moran	R-KS	69%
39	Sen. Roger Wicker	R-MS	68%
40	Sen. Thom Tillis	R-NC	67%
41	Sen. Bill Cassidy	R-LA	67%
42	Sen. John Boozman	R-AR	66%
43	Sen. Mitch McConnell	R-KY	66%
44	Sen. Lindsey Graham	R-SC	64%
45	Sen. Todd Young	R-IN	64%
46	Sen. Shelley Capito	R-WV	63%
47	Sen. Mike Rounds	R-SD	61%
48	Sen. Mitt Romney	R-UT	58%
49	Sen. Lisa Murkowski	R-AK	52%
50	Sen. Susan Collins	R-ME	50%