Ohio

2009: Ohio passes stupid law requiring 90-day lead time before the election to get on the ballot.

2012: Ohio makes a one-time extension to 60 days before the election because *both* parties need an extention based on the date of their conventions.

2016: both parties nominate early enough so it's not a problem

2020: again, Ohio makes a one-time extension to 60 days before the election because, once again, *both* parties need an extention based on the date of their conventions.

2024: for the first time, the problem affects only one party as the republicans will nominate before the deadline but the Democratic convention is after the deadline. So republicans being republicans, they refuse to agree to any extension.

So it looks like the dnc will have a virtual nominating session ahead of the deadline in order to comply.