John Paul Stevens in the context of Capital punishment in the United States

Bush v. Gore, 531 U.S. 98 (2000), was a landmark decision of the United States Supreme Court on December 12, 2000, that settled a recount dispute in Florida's 2000 presidential election between George W. Bush and Al Gore. On December 8, the Florida Supreme Court had ordered a statewide recount of all undervotes, over 61,000 ballots that the vote tabulation machines had missed. The Bush campaign immediately asked the U.S. Supreme Court to stay the decision and halt the recount. Justice Antonin Scalia, contending that all the manual recounts being performed in Florida's counties were illegitimate, urged his colleagues to grant the stay immediately. On December 9, the five conservative justices on the Court granted the stay, with Scalia citing "irreparable harm" that could befall Bush, as the recounts would cast "a needless and unjustified cloud" over Bush's legitimacy. In dissent, Justice John Paul Stevens wrote that "counting every legally cast vote cannot constitute irreparable harm." Oral arguments were scheduled for December 11.

In a 5–4 per curiam decision, the Court ruled, strictly on equal protection grounds, that the recount be stopped. Specifically, it held that the use of different standards of counting in different counties violated the Equal Protection Clause of the U.S. Constitution; the case had also been argued on Article II jurisdictional grounds, which found favor with only justices Antonin Scalia, Clarence Thomas, and William Rehnquist. The Court then ruled as to a remedy, deciding against the one, proposed by Justices Stephen Breyer and David Souter, of sending the case back to Florida to complete the recount using a uniform statewide standard before the scheduled December 18 meeting of Florida's electors in Tallahassee. Instead, the majority held that no alternative method could be established within the discretionary December 12 "safe harbor" deadline set by Title 3 of the United States Code (3 U.S.C.), § 5, which the Florida Supreme Court had said the Florida Legislature intended to meet. The Court, holding that not meeting the "safe harbor" deadline would violate the Florida Election Code, rejected an extension of the deadline to allow the Florida court to finish counting disputed ballots under uniform guidelines requested in a remedy proposed by Breyer and Souter. That deadline arrived two hours after the release of the Court's decision.

Citizens United v. Federal Election Commission, 558 U.S. 310 (2010), is a landmark decision of the United States Supreme Court regarding campaign finance laws, in which the Court found that laws restricting the political spending of corporations and unions are inconsistent with the Free Speech Clause of the First Amendment to the U.S. Constitution. The Supreme Court's 5–4 ruling in favor of Citizens United sparked significant controversy, with some viewing it as a defense of American principles of free speech and a safeguard against government overreach, and others criticizing it for reaffirming the longstanding principle of corporate personhood, and for allowing large corporations to wield disproportionate political power.

The majority opinion, authored by Justice Anthony Kennedy, held that the prohibition of all independent expenditures by corporations and unions in the Bipartisan Campaign Reform Act violated the First Amendment. The ruling barred restrictions on corporations, unions, and nonprofit organizations from independent expenditures, allowing groups to independently support political candidates with financial resources. In a dissenting opinion, Justice John Paul Stevens argued that the court's ruling represented "a rejection of the common sense of the American people."