GOP voters in Iowa have just two weeks to decide who they'll choose to be the Republican nominee for president.
Three new polls show support in the state dropping for the latest frontrunner, Newt Gingrich. Polls by the New York Times and Public Policy Polling put Congressman Ron Paul at the head of the Republican field in Iowa.
All of the other candidates have targeted Gingrich in debates and campaign ads, as well as on Sunday news talk shows.
"He has been unreliable. And zany? I wouldn't think you'd call mirrors in space to light up highways at night to [be] particularly practical," Romney said on Fox News Sunday.
Click play to watch John Waage's report followed by analysis from Charles Dunn, Regent University distinguished professor of government.
Over the weekend, Romney won the endorsement of Iowa's biggest newspaper, the Des Moines Register. But Gingrich told CBS's Face the Nation he's not particularly impressed.
"I'm actually delighted because the Manchester Union, which is a reliably conservative newspaper, endorsed me. The Des Moines Register, which is a solidly liberal newspaper, did not endorse me," Gingrich said.
One other poll gives Gingrich some hope.
A survey of the Tea Party Patriots showed 31 percent support Gingrich and 28 percent back Michele Bachmann. Romney came in third at 20 percent.