Sen. Rand Paul, R-Ky., greats supporters after speaking at the Iowa GOP Lincoln Dinner event, Friday, May 10, 2013, at the Hotel at Kirkwood Center, in Cedar Rapids, Iowa. Republican Sen. Rand Paul opened his presidential exploration tour Friday with a splashy set of speaking engagements in Iowa designed to broaden his tea party brand into something more mainstream and, perhaps, viable. (AP Photo/Matthew Holst)
Sen. Rand Paul, R-Ky., greats supporters after speaking at the Iowa GOP Lincoln Dinner event, Friday, May 10, 2013, at the Hotel at Kirkwood Center, in Cedar Rapids, Iowa. Republican Sen. Rand Paul opened his presidential exploration tour Friday with a splashy set of speaking engagements in Iowa designed to broaden his tea party brand into something more mainstream and, perhaps, viable. (AP Photo/Matthew Holst) AP
Sen. Rand Paul, R-Ky., greats supporters after speaking at the Iowa GOP Lincoln Dinner event, Friday, May 10, 2013, at the Hotel at Kirkwood Center, in Cedar Rapids, Iowa. Republican Sen. Rand Paul opened his presidential exploration tour Friday with a splashy set of speaking engagements in Iowa designed to broaden his tea party brand into something more mainstream and, perhaps, viable. (AP Photo/Matthew Holst) AP