New Supreme Court Justice Kagan - a part-timer

Elena Kagan, former solicitor general, won't be hearing about half of the cases before the Supreme Court this term.

"Kagan's absence will affect some important corporate and employment- discrimination cases, as well as a highly anticipated review of one of Arizona's attempts to crack down on illegal immigrants."

When the court is evenly split, the decision of the lower court does not get overturned.