bueno pues las leyes que son malas pendejo! aun que no supieras buscala en un libro
ruling that certain laws or presidential actions are unconstitutional
the federal courts are part of a legal system that includes all the courts and laws in the U.S
They have the right to complain to like the Supreme Court or Congress.
Congress has power over the courts because it makes the laws which it must use to try a case. If the court finds the law unconstitutional, they can overturn it.
federal courts
Portions of the Patriot Act were declared unconstitutional in 2004 See http://www.cnn.com/2004/LAW/01/26/patriot.act.ap/ That's at the federal level. State laws can be declared so also. See http://www.keystonepolitics.com/story/aroundcapitol/expanded-state-hatecrimes-law-declared-unconstitutional One of the roles of the appeals courts and supreme courts at both the state and federal level is to rule on the constitutionality of a law.
It is usually the US Supreme Court that can block a federal law. State Supreme Courts block states' laws. They can do this if the law is deemed unconstitutional or is in conflict with rights already protected in other laws.
Any court can declare a law unconstitutional, but the government would appeal the decision to the US Supreme Court, the ultimate arbiter of constitutionality. Due to the appeals process, only the Supreme Court nullifies federal (and sometimes state) laws.
Federal courts have jurisdiction over cases involving federal laws, the Constitution, or disputes between parties from different states. State courts, on the other hand, have jurisdiction over cases involving state laws and disputes between parties within the same state. Federal courts have authority to interpret and apply federal laws, while state courts have authority to interpret and apply state laws.
By committing crimes or torts that violate federal laws.
States from passing laws that contradict federal law.
Federal courts have jurisdiction over cases involving federal laws, the Constitution, disputes between states, and cases involving the United States government. State courts have jurisdiction over cases involving state laws, contracts, property disputes, and criminal cases that are not under federal jurisdiction. Federal courts handle cases that involve federal laws and the Constitution, while state courts handle cases that involve state laws and local issues.