In a previous post, I reported the value of reporting polling data using averages of many polls for the leading candidates. I mentioned that national polls are interesting but the US chooses a president based on the electoral college.
Because the electors are chosen by states, it makes sense to predict winners by observing how the population of a state is likely to vote and thereby decide how many electors "won" by a candidate. This assumes an elector does not go rogue and vote for their preferred candidate.
This map can of course change with every new poll, but has the potential for a more accurate prediction than charts of national polls.
The chart map video is from NBC News.
How do you create map charts?
Microsoft Excel has you covered-- see Create a Map chart in Excel.
In Excel, you will find the map option labeled Geography under the Data tab.
You can download examples with several map charts from Microsoft.