What would be the difference?
The Dems give amnesty to 15 million, instead of "only" 12 million, Mexican nationals?
We have enough liberals in the Senate, (nominal) Republicans and Dems.
The difference is control of the senate. Little things like tax hikes, cuts in defense, no chance of ANWR drilling, an impeachment of the president, sabotaging the war effort. Otherwise, I could care less about a liberal ass like Chafee.
Dems give us justices like Breyer and Ginsburg. Pubbies give us Roberts and Alito. Dems raise taxes, Pubbies cut them. Pubbies aren't perfect, or great, or ,often, even good; they're just better than the alternative.