A new national survey just released by Public Policy Polling shows that although Donald Trump is still the national frontrunner, he's lost significant support among the GOP field since coming in at second place in Iowa Monday. Trump nosedives in @ppppolls national survey: Trump 25 (-9)Rubio 21 (+8)Cruz 21 (+3)https://t.co/pk73CmpSsn— Brett LoGiurato (@BrettLoGiurato) February 4, 2016 According to the survey, Trump has dropped to 25 percent among Republican primary voters, down nine points from December. Senators Ted Cruz and Marco Rubio are tied nationally at 21 percent and the rest of the field, with the exception of Dr. Ben Caron...