Which Supreme Court Justices Are Democrats or Republicans?

No sitting Supreme Court justice is formally a Democrat or a Republican. Justices give up party membership when they take the bench, and the Court’s own Code of Conduct emphasizes independence and impartiality.1Supreme Court of the United States. Code of Conduct for Justices When people ask which Supreme Court justices are Democrats or Republicans, what they usually want to know is which president appointed each one. On that measure, three of the current nine justices were appointed by Democratic presidents and six by Republican presidents, producing the 6-3 conservative majority that defines the current Court.

Why Justices Don’t Have Party Labels

Supreme Court justices are nominated by the president and confirmed by the Senate, but once seated they serve as independent members of the judiciary under Article III of the Constitution. Their lifetime appointments exist specifically to shield them from electoral politics and partisan pressure.2Congress.gov. Overview of Article III, Judicial Branch

The appointing president’s party is the standard shorthand for a justice’s leanings, and in the current era it tracks closely with how justices vote. But the shorthand has famous exceptions. Justice David Souter, appointed by George H.W. Bush, became one of the Court’s most reliable liberal votes. Justice Harry Blackmun, a Nixon appointee, authored Roe v. Wade. Chief Justice Earl Warren, picked by Eisenhower, led one of the most progressive courts in American history. The pattern holds today more consistently than it did in those earlier decades, but it has never been a guarantee.

Justices Appointed by Democratic Presidents

Three current justices were appointed by Democratic presidents and form what observers call the Court’s liberal wing.3Supreme Court of the United States. Current Members

  • Sonia Sotomayor, nominated by President Barack Obama and confirmed in 2009. She previously served on the U.S. Court of Appeals for the Second Circuit and has become the most vocal member of the liberal wing, known for pointed dissents in cases involving civil rights and executive power.
  • Elena Kagan, also nominated by Obama and confirmed in 2010. She served as Solicitor General of the United States and was previously dean of Harvard Law School.
  • Ketanji Brown Jackson, nominated by President Joe Biden and confirmed in 2022. She previously served on the U.S. Court of Appeals for the D.C. Circuit and the U.S. Sentencing Commission, and is the first former federal public defender on the Court.

These three vote together on most high-profile cases. In a 3-6 minority, their influence often shows up in dissents rather than majority opinions, but a well-crafted dissent can shape future litigation, guide lower courts, and occasionally lay the groundwork for a later reversal.

Justices Appointed by Republican Presidents

Six current justices were appointed by Republican presidents.3Supreme Court of the United States. Current Members

  • John Roberts, Chief Justice, nominated by George W. Bush in 2005. He leads the Court and occasionally sides with the liberal justices on procedural or institutional questions.
  • Clarence Thomas, appointed by George H.W. Bush in 1991. He is the longest-serving current justice with more than 34 years on the bench, and is on track in 2026 to become the second-longest-serving justice in the Court’s history, behind only William O. Douglas.4Supreme Court Historical Society. Clarence Thomas Poised to Become the Second-Longest Serving Justice
  • Samuel Alito, nominated by George W. Bush and seated in early 2006. He authored the majority opinion in Dobbs v. Jackson Women’s Health Organization, which overturned Roe v. Wade in 2022.
  • Neil Gorsuch, nominated by Donald Trump in 2017 to fill the seat left vacant by the death of Justice Antonin Scalia.
  • Brett Kavanaugh, nominated by Trump and confirmed in 2018 after a contentious confirmation process.
  • Amy Coney Barrett, Trump’s third appointee, confirmed in late 2020. Her confirmation cemented the 6-3 conservative majority.

This group is not monolithic. Roberts and occasionally Kavanaugh or Barrett break from the other conservatives, producing 5-4 outcomes rather than a clean 6-3 split. On the biggest structural questions, though — the scope of federal agency power, religious liberty, gun rights, and equal protection — the six have voted together with notable consistency.

How Well the Party of the Appointing President Predicts Votes

The deeper divide on today’s Court is between two theories of constitutional interpretation. The conservative justices generally follow originalism, which reads constitutional provisions according to their meaning at the time of ratification. The liberal justices lean toward living constitutionalism, the view that the Constitution’s meaning evolves with society.

These theories produce starkly different outcomes. An originalist reading of the Second Amendment looks to 18th-century practices around firearms; a living constitutionalist reading weighs modern public safety concerns more heavily. In New York State Rifle & Pistol Association v. Bruen (2022), the conservative majority struck down New York’s century-old handgun licensing law using a historical analysis that the three liberal justices rejected entirely.

Neither philosophy maps perfectly onto a political party. Some originalist scholars argue the Fourteenth Amendment, properly read, supports broader equality protections than current doctrine recognizes, and living constitutionalism doesn’t always lead to progressive outcomes. On today’s Court, however, the philosophical split and the appointing-president split line up almost perfectly.

What the 6-3 Split Has Produced

Since Barrett’s confirmation created the 6-3 alignment, the conservative majority has reshaped American law at an extraordinary pace. The most consequential decisions include:

  • Dobbs v. Jackson Women’s Health Organization (2022), which eliminated the constitutional right to abortion.
  • Students for Fair Admissions v. Harvard (2023), which ended race-conscious college admissions.
  • West Virginia v. EPA (2022), which curtailed the Environmental Protection Agency’s authority to address climate change.
  • 303 Creative v. Elenis (2023), which allowed a business owner to refuse services for same-sex weddings on free speech grounds.

The three Democratic-appointed justices dissented together in each. The dissents have grown increasingly forceful. In United States v. Skrmetti during the 2024–2025 term, Justice Sotomayor wrote that “the Court abandons transgender children and their allies to political whims,” opening with the line, “In sadness, I dissent.” In Trump v. CASA the same term, she accused the majority of enabling “a solemn mockery of our Constitution.” Justice Jackson, writing in Diamond Alternative Energy v. EPA, warned that the majority’s approach “gives fodder to the unfortunate perception that moneyed interests enjoy an easier road to relief in this Court than ordinary citizens.”

For anyone following the Court, the practical picture is this. On divisive social and regulatory issues, the three liberal justices cannot control outcomes. Their role is to articulate an alternative legal framework and, when possible, to pull Roberts or another conservative justice toward a narrower ruling.