FILE - In this Feb. 4, 2015 file photo, former Florida Gov. Jeb Bush, now a Republican presidential candidate, speaks at a Economic Club of Detroit meeting in Detroit. Bush went to Detroit and talked about leveling the playing field. Marco Rubio wrote a book about helping the working class. Rand Paul wants to expand the Republican Party beyond its traditional base. Yet all three presidential candidates have released tax proposals that would overwhelmingly benefit the wealthiest. Democrats say it's proof that the GOP's eventual nominee will mainly try to help the rich. (AP Photo/Paul Sancya, File)