Andree, Lisa Murkowski was a centrist in 2010 and she's remained a centrist since.  Look at her voting record and you'll see.  But if that's too much trouble, look at the Miller supporters who call her a RINO and the Begich supporters who call her a right wing Republican.  Neither are right, but there are enough votes on either side of the aisle to show Lisa is exactly what she promised she would be.  
As for the Supreme Court being "useless, irrelevant and broken" have you taken any time at all to review the fact that they've issued many decisions since Scalia died?  And most of those decisions were not even close.