Former Florida Gov. Jeb Bush says he knows he needs to improve his lackluster performance in the debates if he’s going to have a chance at the 2016 Republican presidential nomination. “I know that I got to get better at doing the debate,” Bush said in an interview that aired on NBC’s “Meet The Press” Sunday. “I’m a grinder. I mean, when I see that I’m not doing something well then I reset and I get better.”