federal courts have the right to
laws that they feel are violating the constitution.

federal courts have the right to nullify laws that they feel are violating the Constitution.  In order to do that, they first must review the laws.  After reviewing them, they may nullify them if they feel the laws are unconstitutional.

of course, there can be debate among the members of a court over whether a given law is unconstitutional.  However, the court as an entity does not enter explanation

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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answer; i do believe its (wife); good luck