Leo Theodore Sorokin
Appointed by President Barack Obama in 2014 and confirmed by the Senate 91–0, Leo Theodore Sorokin is a Judge on the U.S. District Court for the District of Massachusetts. He earned a law degree from Columbia Law School in 1991. Rulings & record ↓ Sources ↓
- Born
- 1961 · age 65
- Appointed by
- Barack Obama, 2014
- Confirmed
- 91–0
- Education
- Yale College 1983 · Columbia Law School 1991
- Succeeded
- Joseph Louis Tauro
Federal judicial service
| Year | Court | Appointed by | Vote |
|---|---|---|---|
| 2014 | District of Massachusetts succeeded Joseph Louis Tauro | Obama (D) | 91–0 |
Party letters show the appointing president’s party, not the judge’s own.
Confirmation vote
Nomination Confirmed 91–0 on June 10, 2014 · 113th Congress, Roll Call 180. Each senator links to their judicial-voting record.
Voted to confirm · 91
49 D, 40 R, 2 I
- Lamar Alexander(R-TN)
- Kelly Ayotte(R-NH)
- Tammy Baldwin(D-WI)
- John Barrasso(R-WY)
- Mark Begich(D-AK)
- Michael Bennet(D-CO)
- Richard Blumenthal(D-CT)
- Roy Blunt(R-MO)
- Cory Booker(D-NJ)
- John Boozman(R-AR)
- Barbara Boxer(D-CA)
- Sherrod Brown(D-OH)
- Richard Burr(R-NC)
- Maria Cantwell(D-WA)
- Ben Cardin(D-MD)
- Thomas Carper(D-DE)
- Bob Casey(D-PA)
- Dan Coats(R-IN)
- Tom Coburn(R-OK)
- Susan Collins(R-ME)
- Christopher Coons(D-DE)
- Bob Corker(R-TN)
- John Cornyn(R-TX)
- Mike Crapo(R-ID)
- Ted Cruz(R-TX)
- Joe Donnelly(D-IN)
- Richard Durbin(D-IL)
- Michael Enzi(R-WY)
- Deb Fischer(R-NE)
- Jeff Flake(R-AZ)
- Al Franken(D-MN)
- Kirsten Gillibrand(D-NY)
- Chuck Grassley(R-IA)
- Kay Hagan(D-NC)
- Tom Harkin(D-IA)
- Orrin Hatch(R-UT)
- Martin Heinrich(D-NM)
- Heidi Heitkamp(D-ND)
- Dean Heller(R-NV)
- Mazie Hirono(D-HI)
- John Hoeven(R-ND)
- Jim Inhofe(R-OK)
- Johnny Isakson(R-GA)
- Mike Johanns(R-NE)
- Tim Johnson(D-SD)
- Ron Johnson(R-WI)
- Angus King(I-ME)
- Mark Kirk(R-IL)
- Amy Klobuchar(D-MN)
- Mary Landrieu(D-LA)
- Patrick Leahy(D-VT)
- Mike Lee(R-UT)
- Carl Levin(D-MI)
- Joe Manchin(D-WV)
- Edward Markey(D-MA)
- John McCain(R-AZ)
- Mitch McConnell(R-KY)
- Robert Menendez(D-NJ)
- Jeff Merkley(D-OR)
- Barbara Mikulski(D-MD)
- Lisa Murkowski(R-AK)
- Christopher Murphy(D-CT)
- Patty Murray(D-WA)
- Bill Nelson(D-FL)
- Rand Paul(R-KY)
- Rob Portman(R-OH)
- Mark Pryor(D-AR)
- Jack Reed(D-RI)
- Harry Reid(D-NV)
- James Risch(R-ID)
- Pat Roberts(R-KS)
- Jay Rockefeller(D-WV)
- Marco Rubio(R-FL)
- Bernie Sanders(I-VT)
- Brian Schatz(D-HI)
- Charles Schumer(D-NY)
- Jeff Sessions(R-AL)
- Jeanne Shaheen(D-NH)
- Richard Shelby(R-AL)
- Debbie Stabenow(D-MI)
- Jon Tester(D-MT)
- John Thune(R-SD)
- Pat Toomey(R-PA)
- Mark Udall(D-CO)
- Tom Udall(D-NM)
- David Vitter(R-LA)
- John Walsh(D-MT)
- Elizabeth Warren(D-MA)
- Sheldon Whitehouse(D-RI)
- Roger Wicker(R-MS)
- Ron Wyden(D-OR)
Did not vote · 9
4 D, 5 R
- Saxby Chambliss(R-GA)
- Thad Cochran(R-MS)
- Dianne Feinstein(D-CA)
- Lindsey Graham(R-SC)
- Timothy Kaine(D-VA)
- Claire McCaskill(D-MO)
- Jerry Moran(R-KS)
- Timothy Scott(R-SC)
- Mark Warner(D-VA)
Education
| Yale College | B.A. | 1983 |
| Columbia Law School | J.D. | 1991 |
Judicial Record
Caseload & case types
In our data, Sorokin was assigned 2,521 district-court cases (1988–2026). Median time from filing to termination: 204 days across 2,110 closed cases.
Case assignment is from CourtListener’s PACER-derived docket records: a partial sample, not a complete caseload, reflecting the judge last assigned each case. How we count.
On appeal
Of 164 of Sorokin’s decisions reviewed on the merits by the U.S. courts of appeals in our data, 142 were affirmed, 14 reversed or vacated, and 8 affirmed in part and reversed in part. This is a historical count of appellate outcomes for cases we could match, not a judgment of the judge, and not a complete record. How we count.
In our data, Sorokin authored 6 published opinions for the court (2007–2011). Most cited: NUON v. City of Lowell (27 citations).
A selective record from published opinions in the CourtListener corpus, not every ruling; most unpublished district orders are not included. Counts and rankings are objective and recomputable: how we count. We describe the record, not the judge.
Recent & notable rulings
| Year | Case | Citation | Cited |
|---|---|---|---|
| 2011 | NUON v. City of Lowell | 768 F. Supp. 2d 323 | 27 |
| 2007 | United States v. Caine | 517 F. Supp. 2d 586 | 9 |
| 2009 | Kingsborough v. Sprint Communications Co., Lp | 673 F. Supp. 2d 24 | 5 |
| 2007 | United States v. Pesaturo | 519 F. Supp. 2d 177 | 5 |
| 2009 | United States v. Mehanna | 669 F. Supp. 2d 160 | 1 |
| 2011 | United States v. Cusick | 817 F. Supp. 2d 1 | 0 |
Showing the 6 most-cited of 6 authored opinions in our data. “Cited” is inbound citations across the CourtListener corpus. Case links open the ruling’s full text (CourtListener) or its page here; read the methodology and verify against the primary source.
Questions & answers
- Who appointed Leo Theodore Sorokin?
- President Barack Obama appointed Leo Theodore Sorokin to the U.S. District Court for the District of Massachusetts in 2014.
- Was Leo Theodore Sorokin appointed by a Democrat or a Republican?
- Leo Theodore Sorokin was appointed by President Barack Obama, a Democrat. JudicialFinder records the appointing president's party, not a judge's own politics.
- What was Leo Theodore Sorokin's confirmation vote?
- The Senate confirmed Leo Theodore Sorokin 91–0 on June 10, 2014.
- Which court is Leo Theodore Sorokin on?
- Leo Theodore Sorokin is a Judge on the U.S. District Court for the District of Massachusetts.
Sources
Each fact on this page traces to a primary public record.
- FJC Biographical Directory
- Wikidata
- Portrait: U.S. Senate Judiciary Committee (Public domain), via Wikimedia Commons
- Confirmation roll-call (Senate.gov, 2014)
- CourtListener bulk data (Free Law Project): authored opinions & citation counts
How we source & reconcile data → Data & Sources
See something wrong? Report an error. Fixes are logged in the corrections log.
12 years on the U.S. District Court for the District of Massachusetts. Data as of 2026-08-10. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).