With six days to go before the Pennsylvania primary election, Sen. Barack Obama and Sen. Hillary Rodham Clinton remain in a statistical tie, according to a new poll from Public Policy Polling.

Results released today give Mr. Obama a 45-42 lead over Mrs. Clinton, with a margin of error of plus or minus 3 percent. The PPP surveyed 1,095 likely Democratic primary voters on April 14 and 15.

In previous PPP polls, Mrs. Clinton led 46-43 a week ago, but Mr. Obama was up 45-43 two weeks ago.

The latest findings suggest that Mr. Obama has not been hurt by recent remarks about "bitter" Pennsylvania voters, said Dean Debnam, president of the PPP, in a statement.

"PPP has been in the field now in both Pennsylvania and North Carolina since Obama's 'bitter' remarks and has seen no ill effects for Barack Obama," Mr. Debnam said. "It doesn't appear the Clinton campaign has been able to gain any momentum with this issue."

Also out today, a new Franklin & Marshall College Poll shows Mrs. Clinton leading 46-40, with a margin of error of plus or minus 5.1 percent. That survey involved interviews April 8-13 with 367 likely Democratic voters.

A Quinnipiac University poll released yesterday found that Mrs. Clinton holds a 50 to 44 percent lead among 2,103 likely Democratic primary voters. Those results were unchanged since an April 8 Quinnipiac poll.

First Published: April 16, 2008, 3:15 p.m.