Donald Trump is back on top in in Iowa, taking the lead from Dr. Ben Carson , a new Quinnipiac Poll has found.<br />This compares to the results of an Oct.22 survey by the Hamden-based university poll showing Carson at 28 percent, with 20 percent for Trump, Rubio at 13 percent and Cruz at 10 percent.<br />One thing that hasn't changed is the poor showing for former Florida Gov. Jeb Bush , who goes from 5 percent October 22 to 4 percent today.<br />The Iowa Republican Caucus has become a two-tiered contest: Businessman Donald Trump and neurosurgeon Ben Carson lead on the outsider track, and Sens. Ted Cruz and Marco Rubio lead among party insiders," Peter A. Brown , assistant director of the Quinnipiac University Poll, said in a release.
