What isn’t currently possible is to set up a recurring Calendar event for a relative date like Election Day - a date that is x days after (or before) a fixed date, in this case:
the Monday after the first Tuesday of November in even numbered years
which is
6 days after the first Tuesday of November in even numbered years.

The first Tuesday of November in even numbered years is possible
[set up the first date, repeat monthly every 24 months]
but not a date that is 6 days later...