If conservatives came out for McCain and Romney despite insisting they wouldn't, they will for Jeb too.
That said, I don't think Jeb is the strongest. I see Kasich and possibly Walker/Paul as stronger.
They DIDNT come out for Romney and McCain. Both got fewer votes than GW Bush when Bush ran a "Base Campaign" in 2004.
This is simply not factual. Romney actually got more 'conservative' and more white evangelical (base) votes than Bush in 04.
Conservatives: % of voters / % GOP
Bush 04 34 / 84
McCain 08 34 / 78
Romney 12 35 / 82
White Evangelical Christians: % of voters / % GOP
Bush 04 23 / 78
McCain 08 26 / 74
Romney 12 26 / 78
Romney was able to get more white evangelicals than Bush even though the number of white voters overall shrunk 6%. The biggest difference between Bush in 04 and McCain and Romney was Bush's appeal to non-GOP base voters and moderates, especially non-whites.
Non-whites: % of voters / % GOP
Bush 04 22 / 27
McCain 08 26 / 18
Romney 12 28 / 18
That is why people thing Jeb Bush can win.