“Former Secretary of State Hillary Clinton's margins are down in matchups with possible 2016 Republican presidential candidates in three critical swing states, Florida, Ohio and Pennsylvania… but she still runs best overall of any candidate,” it said.
In Florida, Clinton support stood at 42 percent in close contest to that state’s former Governor Jeb Bush whose support stands at 45 percent, according to the poll.
Quinnipiac University specified that in no state voters said Clinton is “honest” and “trustworthy.”
"The good news for Hillary Clinton is that the e-mail controversy has not done huge violence to her presidential chances," Quinnipiac Poll Assistant Director Peter Brown said.
Brown noted, however, that the controversy is taking a toll on Clinton's public image, as majorities in each state think she still has questions to answer on the issue.
Clinton stirred up a controversy after The New York Times published a story citing US Department of State sources, who claimed she used a personal e-mail address between 2009 and 2013 while serving as a US State Secretary, and did not have an official e-mail address.
Clinton said earlier that she used her personal e-mail out of “convenience,” but said she regretted the decision.