Before revision:  These effects appear asymmetric: while Democratic voters traveled less in 2016  , political differences shortened Thanksgiving dinners more among Republican voters, especially where political advertising was heaviest. Partisan polarization may degrade close family ties with large aggregate implications; we estimate 27 million person-hours of cross-partisan Thanksgiving discourse were lost in 2016 to ad-fueled partisan effects.
After revision:  These effects appear asymmetric: while Democratic voters traveled less in 2016 , political differences shortened Thanksgiving dinners more among Republican-precinct residents. Nationwide, 34 million person-hours of cross-partisan Thanksgiving discourse were lost in 2016 to ad-fueled partisan effects.