The SurveyUSA poll shows that Clinton's lead among Hispanics and women has narrowed, and among North Texas Democrats, the New York senator's narrow lead is now a 19 point deficit, KRLD-AM of Dallas reported.

On the Republican side, the party's presumptive nominee Arizona Sen. John McCain has widened his lead over former Arkansas Gov. Mike Huckabee, 56 percent to 32 percent, the station reported.

In a hypothetical general election match-up between Clinton and McCain, the poll found that McCain would win, 49 percent to 43 percent, with 7 percent undecided. McCain would also win a race against Obama, 49 percent to 41 percent, with 10 percent undecided, the poll found.

Neither the sample size nor the poll's margin of error were reported.