Scalia was one of the last, and best, bulwarks against the Constitution-shredding kooks on the Court. Now that he has died, Obama has stated his plan to nominate a replacement. You can be sure that replacement will be another radical.
A radical replacement can be stopped, however, if the Senate Republicans refuse to seat such a nominee, deferring the replacement until Obama is out of office. Whether they will, however, remains to be seen.