Do politics play a role in TV viewing? 
Yes and no, according to Nielsen IAG, which recently released data showing which cable programs are most “engaging” among self-identified Democrats and Republicans.
“Engagement” refers to the amount of attention paid to a television program by the average viewer.  Nielsen measures TV engagement by questioning a representative panel of viewers about their recall of specific telecasts’ content.
Nielsen’s analysis found that the cable programs that received the highest overall engagement scores — meaning viewers were most engaged in the shows’ content — also received the most bipartisan support, …

Will the presidential elections impact Hollywood? 
If history is any guide, Democratic presidents are associated with larger box office sales growth.  From 1980 to 2007, box office sales grew by 2.8%, on average, during Democratic administrations, while average sales growth under Republican administrations was just 1%, according to research released Monday by Nielsen PreView.
Overall, in the past three decades, movie sales have grown almost three times faster during Democratic administrations than during GOP administrations, according to Nielsen.