What branch decides if laws are constitutional?

Answer 1

The Judicial branch. Any court may declare a law relevant to a case before it unconstitutional, but the Supreme Court of the United States (also called the US Supreme Court) is the final arbiter of constitutional interpretation.
By the precedent set in the case of Marbury vs. Madison, the US Supreme Court (judicial branch) can rule laws unconstitutional.

Answer 2

The judicial branch of government is responsible for deciding if a law is unconstitutional.

On February 24, 1803, the United States Supreme Court, led by Chief Justice John Marshall, decided the landmark case of Marbury vs Madison, which confirmed the authority of the Supreme Court to limit Congressional power by declaring legislation passed by Congress unconstitutional.

Chief Justice Marshall reasoned that if a conflict between two laws resulted in a case coming before the Court, then it was clearly necessary for the Court to determine which law to apply. One basis for deciding the applicability of a law would be the determination that it was not made in accordance with the Constitution, while the other was either was in accordance with the Constitution or was the Constitution itself. In that case, the Supremacy Clause of the Constitution made it clear that the Constitution or the act of Congress made in accordance with it was the applicable law and the other law could not be enforced.

Nothing in the text of the Constitution explicitly authorized this power of the Supreme Court, but there was legal precedent for it in the common law of England (which formed the basis for our legal system); in prior decisions of the Supreme Court and state courts, in discussions held in the states' Conventions held to determine whether the Constitution would be ratified, and in No. 78 of the Federalists Papers, in which Alexander Hamilton asserted that under the Constitution, the federal courts would have not just the power, but the duty, to examine the constitutionality of statutes:

More than precedent, though, it may have been Chief Justice Marshall's logical reasoning and clearly written explanation that led to virtually unquestioned acceptance of the Court's authority in this area.

Answer 3

The judicial branch decides if laws are constitutional.

Answer 4

The Legislative Branch

Answer 5

Judicial branch at state level.

Answer 6

Judicial Branch

Answer 7

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