Whether you agree with the political capital squandered or not, Dubya used the Dem-crossover thing to stunning success so it's no surprise at all that Jeb would do the same thing. And Jeb probably has a bigger hurdle to winning Dem votes in Florida than Dubya had winning Dem votes in Texas. The once-dominant Democrat Party in Texas has become so marginalized that they are running a black for U.S. Senator and a Hispanic for Governor because they are now the minority party in the truest sense of the word. They can't even field a full slate of candidates in some counties around Texas.
I'm sure Rove or Hughes tipped Jeb off to this ploy a long time ago.