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

Deciding whether the case before them is within the guidelines of the Constitution

Explanation:

Determining whether a case is constitutionaly correct or incorrect has always been the main focus or concern of the Supreme Court.

the answer is "focused on"

lol gave an answer 1 week that's the answer for those who need it in the future xd

me with my last question i posted