The 1803 case Marbury v. Madison showed that the Supreme Court is a check against legislative power.
certain laws have not changed in over 200 years.
certain laws can be reviewed by Congress.
the Supreme Court can determine presidential appointments.

Why did un coalition troops battle iraqi forces in 1991? iraq had invaded saudi arabia, along with its other border nations. iraq had invaded kuwait, which was a major source of the world's oil. the united nations wanted to remove saddam hussein from power. the united nations wanted to prevent the trade of illegal drugs.