Former Florida Gov. Jeb Bush is to deliver what aides call an “optimistic, conservative vision for the future” in his first unpaid speech since declaring his interest in a bid for the 2016 Republican presidential nomination. […] Wednesday’s speech is the first in a series of stops his aides call his “Right to Rise” tour, borrowing from his economic mantra and the name of the political action committee he formed in December. Bush’s speech, aides said, is aimed at underscoring his desire to reinvigorate the middle class, which he argues has languished despite the ongoing economic recovery. Conservative economic policies,...