The Public Policy Polling survey or PPP released on Tuesday showed that Clinton got the worse of four matchups with GOP candidates, Scott Walker, Marco Rubio, Mike Huckabee and Dr. Ben Carson.
These results should be of big concern to the Democrats given Iowa was carried by President Obama during both election victories of 2008 and 2012. The Democratic race is a runaway thus far by Clinton, whereas the Republicans are in a dogfight.
Clinton is well ahead in other polls in Iowa of her Democratic rivals, but this survey will likely add to the thought that Clinton might be vulnerable if she were to reach the general election.
A recently released survey from Quinnipiac showed the former Secretary of State trailing GOP candidates in important swing states such as Colorado, Virginia and Iowa. Other polls have indicated that voters do not trust her.
The Republicans believe she is flawed as a candidate and have lashed out about her use of a private server for email while she was the top U.S. diplomat, hoping this would resonate with the voters.
The poll was not a complete loss for the frontrunner of the Democrats. Clinton beat many of the potential challengers from the Republican Party including Donald Trump the current GOP frontrunner by 3% and Jeb Bush by 4%.
The margins either for or against Clinton were small in each case. The poll contains a margin of error of up to plus or minus 2.5, which means that only a 5-percentage point lead or bigger represents a definitive advantage.
Clinton was neither a winner or loser by that margin against 11 GOP candidates.
The small margin of difference in the poll underlines that Iowa will again be fiercely contested. In the past six general elections since 1992, Iowa backed the White House winner five out of six times. The only exception was in 2000 when Al Gore then the Vice President won Iowa but lost the election to George W, Bush the then Governor of Texas.