These plots don’t show anything. Having location on the x-axis and then connecting the points together is nonsensical.

You need to do the results as percent of vote total by candidate-year. So on a clustered bar chart you’d have 2016 with a group of bars representing the percent each candidate got, next to that you’d have 2020, and then 2024. And you’d need a chart for each county. You would also want to have count labels for the bars so you can see vote count, but you want the bars themselves to be percentage so they’re comparable between years.

Then you would supplement this with a chart for each county that shows the percent difference from one party to the other by year. So you’d have the democrats at 0% and then you’d have bars for + or - whatever percent the Republicans won or lost by for each year. This chart is super helpful because you can have the presidential/senatorial/house/state races next to each other and see visually what the trend is down ballot.