washington tennessee governor bill haslam thursday endorse u.s. senator marco rubio florida republican party presidential nomination marco stand next hillary clinton debate stage choice future past clear every american marco innovative policy agenda reclaim american dream people conservative ideas bring republican party america future haslam popular second-term republican governor say statement rubio senator ted cruz texas trail real estate billionaire donald trump poll race represent party nov. presidential election report eric walsh edit susan heavey article fund part sap independently create reuters editorial staff sap editorial involvement creation production tennessee governor endorse rubio republican presidential bid