Bush trails by 13 points. Former Secretary of State Hillary Clinton holds a wide lead over former Florida Governor Jeb Bush in Iowa, according to a hypothetical 2016 Presidential poll conducted by Quinnipiac University. Clinton holds 49 percent while Bush trails with 36 percent. Clinton leads all potential 2016 contenders, but holds the greatest margin over Bush. She leads 47-41 percent over Rep. Paul Ryan (R-Wisc.), 46-40 percent over Sen. Rand Paul (R-Ky.)