Excellent illustration. I’ve been noticing this metric as well. It is a way better indicator than stupid rigged media driven polls for measuring popular enthusiasm for one candidate over another. I do not believe a single published poll is anywhere near measuring the real current sentiment. Also, since the near certain demise of Bernie, My FB feed has gone mostly quiet from the known lefties on preferential politics. And those in my feed leaning right who supported other candidates have mostly started posting pro Trump messages. I think folks on both sides are holding their collective breath for the conventions to play out.
Hillary has taken a hit on twitter since the FBI statement.