What it means is motivation.... people more motivated tend to vote more.... they are also more active getting others to vote..... even Democrats know she is crooked.... they just believe conservatives are the devils... whatever she did conservatives will do worse... get use to it........
Plus I think it boosts the hidden Trump vote - quietly pro-Trump folks seeing Trump and Trump supporters berated on the news and on social media see those rallies and realize there is a lot of depth to that movement.