Who is the most bipartisan U.S. Senator?

John Fetterman (Democrat - PA) has the lowest party unity score at 80.8%, meaning they vote against their own party more than any other senator.

Which senator misses the most votes?

Mitch McConnell (Republican - KY) has missed 15.0% of roll call votes in the current Congress.

Which state has the most divided Senate delegation?

State delegation agreement rates vary widely. States with split-party delegations (one Democrat, one Republican) typically show the lowest agreement rates, while same-party delegations often agree on over 90% of votes.

U.S. Senate Voting Analysis (119th Congress)

How does every senator vote? Party unity scores, bipartisan records, and missed vote rates — calculated from 915 roll call votes in the current Congress. Browse every individual roll-call vote →

Across 915 roll-call votes this Congress, the most independent voter is John Fetterman (Democrat–PA), who sides with their own party just 80.8% of the time.

At the other end, Jim Justice is the most party-loyal at 99.8%. Mitch McConnell has missed the most roll-call votes, at 15.0%. A party-unity score measures how often a senator votes with their own party's majority — a higher score is more partisan, not better or worse.

Republican Average

53 senators

Party Unity 97.9%

Avg. Missed Votes 2.9%

Democratic Average

45 senators

Party Unity 94.2%

Avg. Missed Votes 3%

Independent Average

2 senators

Party Unity 91.2%

Avg. Missed Votes 4.3%

All Senators — Voting Statistics

Sorted by most bipartisan (lowest party unity). Click any column header to re-sort.

Senator ↕	State ↕	Party ↕	Party Unity ▲	Missed Votes ↕	Total Votes ↕
John Fetterman	PA	Democrat	80.8%	6.4%	856
Rand Paul	KY	Republican	84.2%	4.5%	871
Susan Collins	ME	Republican	84.3%	0.0%	915
Lisa Murkowski	AK	Republican	86.0%	4.2%	877
Jeanne Shaheen	NH	Democrat	86.6%	4.0%	878
Maggie Hassan	NH	Democrat	87.6%	1.5%	901
Angus King	ME	Independent	87.9%	1.5%	901
Tim Kaine	VA	Democrat	89.4%	1.2%	904
Jacky Rosen	NV	Democrat	90.1%	1.5%	901
Mark Warner	VA	Democrat	90.7%	4.4%	875
Mark Kelly	AZ	Democrat	91.1%	5.5%	865
Catherine Cortez Masto	NV	Democrat	91.8%	2.0%	897
Ruben Gallego	AZ	Democrat	92.2%	12.7%	799
Elissa Slotkin	MI	Democrat	92.6%	2.7%	890
Dick Durbin	IL	Democrat	92.7%	2.7%	890
Adam Schiff	CA	Democrat	93.2%	2.4%	893
Martin Heinrich	NM	Democrat	93.5%	3.7%	881
Andy Kim	NJ	Democrat	93.7%	1.0%	906
Jack Reed	RI	Democrat	93.9%	0.9%	907
Raphael Warnock	GA	Democrat	93.9%	2.8%	889
Chris Coons	DE	Democrat	94.0%	5.7%	863
Amy Klobuchar	MN	Democrat	94.2%	1.4%	902
Cory Booker	NJ	Democrat	94.2%	4.4%	869
Bernie Sanders	VT	Independent	94.5%	7.0%	851
Kirsten Gillibrand	NY	Democrat	94.5%	2.0%	897
Gary Peters	MI	Democrat	94.6%	2.1%	896
John Hickenlooper	CO	Democrat	94.6%	1.1%	905
Sheldon Whitehouse	RI	Democrat	94.7%	3.9%	879
Ed Markey	MA	Democrat	94.8%	0.8%	908
Elizabeth Warren	MA	Democrat	94.9%	1.5%	901
Peter Welch	VT	Democrat	95.1%	5.8%	862
Josh Hawley	MO	Republican	95.2%	4.0%	878
Jon Ossoff	GA	Democrat	95.5%	5.6%	864
Chris Murphy	CT	Democrat	95.5%	2.7%	890
Alex Padilla	CA	Democrat	95.7%	3.6%	882
Jeff Merkley	OR	Democrat	95.9%	0.8%	908
Thom Tillis	NC	Republican	96.0%	12.5%	801
Dan Sullivan	AK	Republican	96.1%	3.1%	887
Angela Alsobrooks	MD	Democrat	96.2%	1.6%	900
Mazie Hirono	HI	Democrat	96.3%	0.4%	911
Michael Bennet	CO	Democrat	96.4%	9.0%	833
Brian Schatz	HI	Democrat	96.5%	1.2%	904
Chris Van Hollen	MD	Democrat	96.6%	1.5%	901
Rick Scott	FL	Republican	96.6%	0.2%	913
Mike Lee	UT	Republican	96.6%	3.1%	887
Tammy Duckworth	IL	Democrat	96.7%	6.6%	855
Mitch McConnell	KY	Republican	96.7%	15.0%	778
Ben Luján	NM	Democrat	96.8%	1.3%	903
Richard Blumenthal	CT	Democrat	97.1%	1.2%	904
Lisa Blunt Rochester	DE	Democrat	97.2%	0.7%	909
Ron Wyden	OR	Democrat	97.2%	1.9%	898
Bill Cassidy	LA	Republican	97.2%	5.5%	865
Maria Cantwell	WA	Democrat	97.4%	0.2%	913
Tammy Baldwin	WI	Democrat	97.4%	0.1%	912
Darline Graham Nordone	SC	Republican	97.5%	10.6%	40
Chuck Schumer	NY	Democrat	97.6%	0.4%	911
Ron Johnson	WI	Republican	97.6%	1.3%	903
John Thune	SD	Republican	97.9%	0.1%	914
Jerry Moran	KS	Republican	98.0%	5.8%	862
Tommy Tuberville	AL	Republican	98.2%	6.6%	855
Tina Smith	MN	Democrat	98.2%	4.6%	873
John Kennedy	LA	Republican	98.2%	1.7%	899
Ashley Moody	FL	Republican	98.2%	1.2%	896
Ted Cruz	TX	Republican	98.3%	5.1%	868
Patty Murray	WA	Democrat	98.4%	5.6%	864
Alan Armstrong	OK	Republican	98.4%	0.0%	191
Todd Young	IN	Republican	98.5%	0.9%	907
Cynthia Lummis	WY	Republican	98.5%	3.3%	885
Ted Budd	NC	Republican	98.5%	2.7%	890
Jon Husted	OH	Republican	98.7%	0.0%	907
Roger Wicker	MS	Republican	98.8%	3.5%	883
Mike Rounds	SD	Republican	98.9%	0.9%	907
John Curtis	UT	Republican	98.9%	2.1%	896
Cindy Hyde-Smith	MS	Republican	99.1%	1.9%	898
Shelley Capito	WV	Republican	99.1%	1.9%	898
Jim Banks	IN	Republican	99.1%	1.3%	903
Bill Hagerty	TN	Republican	99.1%	3.5%	883
Joni Ernst	IA	Republican	99.1%	2.3%	894
John Boozman	AR	Republican	99.2%	1.5%	901
Deb Fischer	NE	Republican	99.2%	1.0%	906
Chuck Grassley	IA	Republican	99.2%	2.6%	891
Katie Britt	AL	Republican	99.2%	2.3%	894
Eric Schmitt	MO	Republican	99.3%	1.2%	904
Kevin Cramer	ND	Republican	99.3%	3.5%	883
Bernie Moreno	OH	Republican	99.3%	0.5%	910
John Barrasso	WY	Republican	99.3%	0.4%	911
James Lankford	OK	Republican	99.4%	0.7%	909
Marsha Blackburn	TN	Republican	99.4%	5.8%	862
Roger Marshall	KS	Republican	99.6%	0.9%	907
Tim Sheehy	MT	Republican	99.6%	2.6%	891
David McCormick	PA	Republican	99.6%	2.8%	889
Pete Ricketts	NE	Republican	99.6%	1.0%	906
John Hoeven	ND	Republican	99.6%	1.0%	906
John Cornyn	TX	Republican	99.7%	1.4%	902
Jim Risch	ID	Republican	99.7%	2.8%	889
Mike Crapo	ID	Republican	99.7%	1.2%	904
Steve Daines	MT	Republican	99.7%	2.8%	889
Tim Scott	SC	Republican	99.8%	3.0%	888
Tom Cotton	AR	Republican	99.8%	1.5%	901
Jim Justice	WV	Republican	99.8%	4.2%	875