WASHINGTON (CNN) - New York Sen. Hillary Clinton is increasing her lead over her Democratic rivals and either beating or tied with the Republican frontrunner in Ohio, Florida and Pennsylvania, according to a new Quinnipiac poll released Wednesday.
"Sen. Clinton is inching ahead," Peter A. Brown, assistant director of the Quinnipiac University Polling Institute, said in a press release. "Not only does she lead by a nose in two of the most important swing states in the Electoral College, but she is turning around independent and Republican voters who previously viewed her negatively."
In Florida, a crucial swing state, Clinton leads Giuliani 46-44 percent. She tops Giuliani in Pennsylvania by 45-44 percent and is tied with the Republican leader in Ohio.
The poll also evaluated other hypothetical match-ups. In all three states, Giuliani topped Illinois Sen. Barack Obama. But both Clinton and Obama beat former Sen. Fred Thompson, who has done well in polls but has yet to announce his candidacy.
The florida poll involved interviews with 962 voters and had a margin of error of plus-or-minus 3.2 percent. The poll of Florida Republicans had a margin of plus-or-minus 5.1 percent and the poll of Florida Democrats had a margin of error of plus-or-minus 5 percent.
The Ohio poll involved interviews with 974 voters and had a margin of error of plus or minus 3.1 percent. The poll of Ohio Republicans had a margin of error of plus-or-minus 5.3 percent. The poll of Ohio Democrats has a margin of error of plus-or-minus 5.1 percent.
The Pennsylvania poll involved interviews with 1,011 voters and had a margin of error of plus-or-minus 4/7 percent. The poll of Pennsylvania Republicans has a margin of error of plus-or-minus 4.7 percent. The poll of Pennsylvania Democrats had a margin of error of plus-or-minus 4.8 percent.
–CNN Associate Producer Lauren Kornreich