PHILADELPHIA (CBS) -- In the 2020 race for president, Joe Biden has a big lead over his rivals for the Democratic nomination. That's according to a Quinnipiac University survey of Pennsylvania voters.
The poll also shows, in a head-to-head match-up, the former vice president leads President Donald Trump by 11 points -- 53% to 42%.
Sen. Bernie Sanders has a seven-point advantage over President Trump.
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