We're just 15 days away from the 2020 presidential election and President Trump is wasting no time on the campaign trail. This week he'll hold rallies in four different states: Nevada, Arizona, North Carolina and Pennsylvania. 

The demographic make up of who is attending these rallies should concern the Biden campaign. A significant number of attendees are Democrats or new voters. 

This data, combined with new Republican voter registration, indicates the polls aren't telling the whole story.