Fridays at 8 p.m. and Encore Sundays at 10 a.m. on KPBS TV / PBS App. THIS WEEK: With just 54 days to go until Election Day, Vice President Kamala Harris is trying to build on the momentum from her strong debate performance against former President Donald Trump. The candidates entered Tuesday’s debate tied in polls, and the question remains to be whether their showdown has managed to sway critical swing state voters.