The Supreme Court's Key Cases and Big Issues for 2015

The U.S. Supreme Court justices took the bench Monday and like last term, this one is shaping up to be a blockbuster -- with affirmative action in college admissions, unions and legislative districts at issue.

Below are a few of the most significant cases the justices have already agreed to hear; two other big cases they havent yet taken but almost certainly will; and a few notes on another big issue to watch this term.

GRANTED CASES

Fisher v. University of Texas

At issue: Affirmative action in college admissions

Argument date: likely December or January (date not set yet)

This is the second time the court will consider this case, in which plaintiff