Sen. J.D. Vance (R-OH), the Republican vice presidential candidate, will be walking into the lion’s den Tuesday night when he faces off with Gov. Tim Walz (D-MN), the Democratic vice presidential candidate, in front of two heavily biased CBS broadcasters.

According to the latest study of media bias by Media Research Center’s watchdog outlet, NewsBusters, 85% of CBS coverage has been pro-Walz and Vice President Kamala Harris, while 81% of the network’s coverage of the Republican ticket has been anti-Vance and former President Donald Trump.