One of the problems with liberal & conservative in the US is that the system doesn't easily allow for other terms and designations... as if everyone must cram into one or the other.
We really need a multi-party setup, so Tea Partiers can have their own splinter group and let Republicans...well... be something else. But the electoral college design and various primary routines... plus the media... are constructed so as to keep the status quo.

I know...there are 'other' parties, but all one can do is ruin an election for one of the big two.