Which of the following is a right held by everyone living in the United States?

Freedom of expression is a fundamental right guaranteed to everyone living in the United States, not just citizens. It is protected by the First Amendment to the U.S. Constitution, which safeguards individuals' rights to express their thoughts and opinions, practice their religion freely, assemble peacefully, and petition the government. This principle applies to all individuals within U.S. borders, regardless of their immigration status.

The other options describe rights that are either limited or contingent upon specific criteria. The right to bear arms, for example, is generally associated with citizens, as related legislation and interpretations by the Supreme Court have focused on the rights of individuals in the context of gun ownership. Running for office typically requires citizenship, as only U.S. citizens can hold federal and most state offices. Lastly, while healthcare access is an important issue, there is no constitutional right to free healthcare for everyone in the U.S.; healthcare provision varies based on citizenship, residency, and state laws.