If you accurately read Charlie Crist's fortune in 2008, don't sell that crystal ball. A sitting GOP governor in good standing with his party would seek his state's Senate nomination two years later. He would be defeated by a Tea Party darling in the primaries and would run--and lose--as an independent in the general election.
Crist then joins the Democratic Party and is their gubernatorial candidate in 2014. In a Republican wave election, Crist lost to an incumbent by one percentage point. This would have been the best comeback since Richard Nixon, if not Lazarus. Crist might also be a harbinger.
The Dems have a weak bench. The Republicans are mostly RINO's, many of whom are on borrowed time. Boehner and Graham and McCain to name but a few have more in common with the people across the aisle than they have with their own party base. Can you hear the wedding bells?
Nature abhors a vacuum. Don't be surprised if the Dems start looking a lot like the Republican Party of a decade ago.