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Data through Sep 17, 2026Compare members
The Vote Ledger
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Leo William O'Brien

Representative from New York
HOUSEDEMOCRAT1951–1967ID O000015
Compare
LegislationHEADLINE
85%with Dems
of 701 votes
Nominations
—with Dems
of 0 · confirmations only
All contested
85%with Dems
of 701 · both combined
Steepest move
−20 pts
1951 → 1953
still a Democrat

Career arc

Legislation leads. Each point is one Congress: how often they sided with the Democratic majority on contested bills, resolutions and amendments.

100%75%50%25%0%sides with Democrats ↑sides with Republicans ↓195119571963
1965–6689th Congress
Sat as a Democrat
96.3%with Democrats
of 162 contested votes
Votes for this Congress are open below
Steepest move: 1951 → 1953, −20 pts — while still a Democrat.
Sat as a DemocratSat as a RepublicanVotes available below

Votes

Every roll call before 1973 has no description. These rows carry a date, usually a bill number, how they voted and which side that matched — nothing is filled in by hand.

DateBillVoteTypeCastSided with
Oct 21, 1966H.R. 18381No description in the source recordLEGISLATIONYEADEM MAJORITY
Oct 21, 1966H.R. 14644No description in the source recordLEGISLATIONYEABOTH · NOT SCORED
Oct 20, 1966H.R. 17607No description in the source recordLEGISLATIONNAYBOTH · NOT SCORED
Full textNo description in the source record. What survives: the date, the bill number (H.R. 17607), how they voted and which side that matched.Party majoritiesDemocrats Nay · Republicans NayCounts toward scoreNo — both party majorities voted Nay.
Where this lands
NAYVoted with both majorities — not scored
Oct 20, 1966H.R. 13161No description in the source recordLEGISLATIONYEADEM MAJORITY
Oct 20, 1966H.R. 18233No description in the source recordLEGISLATIONYEABOTH · NOT SCORED
Oct 20, 1966H.R. 15111No description in the source recordLEGISLATIONYEADEM MAJORITY
Oct 20, 1966S. 3708No description in the source recordLEGISLATIONYEADEM MAJORITY
Oct 19, 1966S.J.Res. 167No description in the source recordLEGISLATIONYEADEM MAJORITY
Oct 19, 1966H.R. 18233No description in the source recordLEGISLATIONNAYDEM MAJORITY
9 most recent roll calls shown · 162 contested votes scored in the 89th CongressAll votes this Congress →

By policy area

career · legislation
The record carries no policy area for any of these roll calls, so there is nothing to break out.

Service record

8 Congresses
82nd · 195189th · 1965
Democrat · House · NY82nd–89th
Term datesexact
Members · New York
LO

Leo William O'Brien

Representative from New York
HOUSED1951–19678 CONGRESSES
Compare
LegislationHEADLINE
85.4%with Democrats
of 701 votes · 14.6% with Republicans
Nominations—of 0 votes
All contested85%of 701 · combined
Steepest move−20 pts1951→53, as a Democrat

Career arc

10050019511965
1965–66 · 89th · Democrat · of 162 votes96.3%

Legislation leads. Tap a point to read that Congress.

Votes

Every roll call before 1973 has no description. These rows carry a date, a bill number where one exists, how they voted and which side that matched.
Democratic majorityNay
Republican majorityNay
Counts toward scoreNo
Open roll call
Latest 6 shown · 162 contested votes scored in the 89th

By policy area

career

The record carries no policy area for any of these roll calls.

Service record

82nd · 195189th · 1965
Democrat82nd–89th

Party switchers

John Alexander LoganD→R · IL · 40thWesley Wade WatkinsD→R · OK · 105thBen Nighthorse CampbellD→R · CO · 104th
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