Election night this November could feel a lot like the start of the 2000 Florida recount that took 36 days to decide who the next president would be, due to rapid rules changes in states adopting mail-in and absentee ballot systems.

Logistical hurdles to counting mass amounts of ballots and legal challenges revolving around ballots that are not counted could delay full results for days or weeks, which may include uncertainty over whether President Trump or Joe Biden won the election if the race is close in some states.