Supreme Court Limits Presidential Authority in Series of Key Rulings

The U.S. Supreme Court, led by Chief Justice John G. Roberts Jr., issued a series of significant rulings this year that constrained presidential power, rejecting administration efforts to unilaterally alter tariff policy, birthright citizenship, and the deployment of National Guard troops. While the court maintained a conservative majority, it frequently splintered, with Chief Justice Roberts joining varying coalitions to check executive actions.

Court Rejects Unilateral Presidential Power Claims

The Supreme Court issued three major rulings that curtailed the scope of executive authority. The justices struck down worldwide tariffs, ruling that the power to levy import taxes resides with Congress, not the president.

In a separate challenge regarding birthright citizenship, the court rejected an executive order that sought to end the practice. Chief Justice Roberts, writing for the majority, asserted that the Constitution and subsequent legal precedents established the right to citizenship for children born on U.S. soil regardless of parental status. The court also ruled in December that the president did not have the power to put National Guard troops on the streets of Chicago.

These decisions faced significant opposition from within the court. Justices Clarence Thomas and Samuel A. Alito Jr. dissented in all three cases, while Justice Neil M. Gorsuch joined the dissent in two of them.

Internal Divisions and Shifting Coalitions

The court’s term was characterized by fluid voting blocs rather than a strict ideological divide. While the conservative wing remains the court’s core, Chief Justice Roberts frequently sought middle-ground majorities.

In a 5-4 vote, Justice Amy Coney Barrett joined Chief Justice Roberts and Justices Sonia Sotomayor, Elena Kagan, and Ketanji Brown Jackson to uphold state laws that allow for counting late-arriving mail ballots. Barrett also joined the chief justice in the rulings on tariffs and birthright citizenship.

Conversely, the three liberal justices dissented when the court ruled the administration may end Temporary Protected Status for Haitians and Syrians. The court also ruled that the president may replace the top appointees of semi-independent agencies. However, the court joined in a 5-4 ruling that affirmed the independence of the Federal Reserve and blocked Trump’s move to fire Fed Governor Lisa Cook.

Legal Perspectives on the Term

Legal scholars and former clerks note that the court’s performance reflects a complex balance of conservative judicial philosophy and institutional restraint. Harvard law professor Richard Lazarus observed that the Chief Justice is working to build majorities despite intense friction between the court’s ideological poles.

Washington attorney Roman Martinez, a former clerk for Roberts, characterized the court as “clearly right of center” but emphasized the significance of the tariff ruling. “It is a huge deal for the court to say ‘no’ to the president on his major policy initiative,” Martinez stated. Stanford law professor Michael McConnell added that the outcomes undermine claims that the court acts as an extension of the executive branch, noting, “It’s hard to claim the court is in Trump’s pocket when he lost the major cases.”

Historical Precedent and Birthright Citizenship

In the final opinion of the term, Chief Justice Roberts provided a 26-page historical analysis of citizenship. He traced the principle of birthright citizenship from English common law through the post-Revolutionary era.

The opinion addressed the historical impact of the *Dred Scott v. Sandford* decision, which the court used to deny citizenship to Black Americans. Roberts wrote that it took the Civil War and the eventual passage of the 14th Amendment to codify the principle that “all persons born” in the United States are citizens. While the court reaffirmed this principle in 1898, Justice Thomas filed a 91-page dissent arguing that immigrants must be “domiciled” here before their children may become citizens, and Justice Alito authored a 39-page dissent labeling the majority opinion a “serious mistake.”