The president of the United States of America has the constitutional power to nominate candidates based on judicial and elective experience to serve as judges at the supreme courts and those to assume other federal judge positions. When the president nominates the judges, the nomination must then be approved by the senate.
These federal judges do have authority and discretionary responsibilities over all the cases that involve the Constitution of the united states of America and federal laws.
What haourt of Appeals for the Federal Circuit brings the number of federn which lawyers lay out the case for the judges prior to oral arguments in court.