How about you provide a link for that claim. Congress constitutionally determines the number. If judges left their political ideology at the door and only made decisions based on the law and the Constitution we wouldn't be dealing with this BS and majority decisions would be the exception and not the rule.
Well, you're correct that there is no stipulation on the number of justices on the SCOTUS, the REAL fact that 4 to 4 tie decisions will make the Court virtually meaningless in high profile cases.
The Constitution, however, calls for a Chief justice precisely to break tie votes but that individual is also rendered ineffective since the court is currently evenly divided.
I actually very much hope that republican senators block ANY of Clinton's nominees. I DO want a simple majority to rule since the 60 to 40 benchmark has NOT worked very well in getting many things done.....and, of course, I fully realize that if the senate changes to republican hands they too will abuse the simple majority....but at this point, I'll take the chance since these 100 lazy folks just sit around and bitch.