A poll released on the eve of Pennsylvania's primary shows the Democratic U.S. Senate race could be volatile and is still too close to call.
The Quinnipiac University survey released Monday finds that 25 percent of the likely Democratic voters who favor either five-term Sen. Arlen Specter or U.S. Rep Joe Sestak could still change their minds before voting Tuesday.
The poll gives Sestak 42 percent and Specter 41 percent with 16 percent of likely voters undecided.
More voters view Specter, a five-term senator, favorably than Sestak, 50 percent to 42 percent. But one-third view Specter unfavorably and 43 percent say they haven't heard enough about Sestak, a U.S. Congressman, to form an opinion.
The statewide telephone survey of 951 Democrats was conducted between Wednesday and Sunday. The sampling error margin is plus or minus 3.2 percentage points.
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