Democrat Conor Lamb leads Republican Rick Saccone in a new poll of Pennsylvania voters a day ahead of a closely watched special House election. The Monmouth University poll found Lamb has a 51%-45% lead over Saccone if turnout yields a Democratic surge, similar to other special elections over the past year. President Donald Trump has stumped for Saccone in the race, which analysts say will reflect on the president and could help predict the midterm elections.