A new University of Iowa poll out today shows the Democratic and Republican frontrunners holding on to their leads.Romney holds a strong lead in Iowa at 36.2 percent, with Giuliani second at 13.1 percent, Huckabee third with 12.8 percent and Thompson fourth at 11.4 percent. John McCain has 6.0 percent. In the race for the Democratic presidential nomination, meanwhile, a slip in John Edwards' numbers has allowed Hillary Clinton and Barack Obama to tighten their grips on the No. 1 and No. 2 spots, respectively. Among all likely Democratic caucus-goers, Clinton leads with 28.9 percent, followed by Obama with 26.6 percent, Edwards with 20.0 percent, Bill Richardson with 7.2 percent and Joe Biden with 5.3 percent. The poll has a rather high error factor - plus or minus 5.8% - but measures support for candidates among "likely caucus goers."Contrast Romney's big lead in Iowa with his dwindling support nationally - now standing at just 7% according to the latest Fox poll. While...(Read Full Post)