[meadsjn]

Lots of Democrats already vote in multiple states with one election day.
20 days of voting might let them vote in 48 states each.

[cripplecreek]

Where I live, I could feasibly vote here in Michigan then Ohio, Indiana, Illinois, and Wisconsin. If I were feeling ambitious and all went my way I could also hit Iowa or Minnesota.

It would be a 500 to 600 mile one way trip but I would gain an extra hour changing time zones.