The media is moving minds en masse and changing narratives to fit their agenda. Literally have a huge impact on election swaying.
I dont really think media moves very many minds simply because the people now days have so many options that they choose the media sources that tell them what they want to here - - its not like it was when most of us were young and you only had a handful of media options
Also very very few people actually research both sides of the issues and then use their own minds before they vote - - - for the most part you have two types - people who picked the R or D side years ago probably because that's what mom and dad were and will never vote any differently no matter what the policies of the actual candidates might be and then you have the sheep who dont even think about it and simply follow what they are told by the others in their particular heard.