When he takes the stage in the one and only vice presidential debate on Thursday, Vice President Joe Biden will have to overcome low public opinion ratings and low expectations.

Just 39 percent of voters have a positive view of Biden, according to a new Pew Research Center poll, while 51 percent have a negative view. By comparison, 44 percent have a favorable view of Republican vice presidential candidate Paul Ryan, while 40 percent have a negative view. The poll was conducted Oct. 4-7.