On paper, Jeb Bush is the perfect establishment candidate for the Republican presidential nomination:
A two-term governor of a crucial swing state who oversaw economic expansion and spearheaded education reform.
A conservative, but with a cerebral, optimistic tone that probably won't enrage moderate voters, unlike the unabashed social-issue warriors in the GOP field.
A prolific fundraiser whose advantage stems from the powerful donor networks of his brother, former President George W. Bush, and his father, former President George H.W. Bush.
Yet the former Florida governor — for all his might on paper — has failed to catch on with Republican...