You mean he wants the Republican party to move to the left of the Democratic party? That's not going to happen.
Or maybe just roll back the clock to, say, the far more tolerable GOP of the 1980s.
Remember? When the GOP was for limited government (and meant it), balanced budgets, intelligent foreign policy, and for keeping out of people's private lives?
Well, Reagan was far more tolerable than Bush, but that's not saying much. Maybe you meant the pre-1980 GOP? Of course, I would want the Democrats to back to their pre-1980 roots, too, with people like Senators Frank Church, George McGovern, and Birch Bayh.
The Democrats may have regained the Senate (3 different times) since 1980, but they have never truly recovered from the 1980 Senate elections.
http://en.wikipedia.org/wiki/United_States_Senate_elections,_1980