The study by Emerson College and The Hill, conducted in mid September among over 800 likely voters, has the Democrat ahead by six percentage points

Pa., is leading his Republican challenger, David McCormick, by 9 percentage points among likely voters, according to a new poll by The Philadelphia Inquirer, The New York Times, and Siena College. Casey,

Pennsylvania Sen. Bob Casey (D) is leading his Republican rival Dave McCormick in new Keystone State polling. In a new poll from The Philadelphia Inquirer/The New York Times/Siena College, Casey garnered 49 percent support from the likely electorate in Pennsylvania compared to McCormick’s 40 percent.