I think it will take a couple of election cycles before the GOP and the Tea Party will be able to come to terms and find a common platform that will be attractive enough to sway the majority of voters to come back.
Or, The GOP can cut ties entirely and just rebuild. I think with the Christies, jingals, and Rubios', they got a pretty good line-up to build on. I think this would be their best move. Kick the TP to the curb.