 A new poll out before that debate says Donald Trump's taking the lead over President Biden nationally. A Quinnipiac poll says 73% of voters will likely watch the debate. 16% say each candidate's performance could lead them to changing their vote. The poll also finds Trump leading President Biden 49% to 45% in a head-to-head matchup. Trump had trailed by 1% back on May 22nd for the Quinnipiac poll.