The supreme court's main concern is

hearing cases concerning the actions of elected officials
deciding if a law passed by congress is actually legal
deferring to the senate who must confirm supreme court justice appointments
deciding whether the case before them is within the guidelines of the constitution

The major impact third parties have on presidential elections has been to.. a. encourage larger vote turnout b. recruiter leader from the democratic and republican party to run for president c. generate increased party identification among the electorate d. developing issues that are later adopted by the major political parties e. drawn off of votes from the major parties to throw election into the house representatives