Delaware recognizes parties if they have registration of at least one-tenth of 1% of the state total. At the February 2019 tally, the American Delta Party, which had been qualified, slipped below the minimum needed. It has 664 registrants but the minimum requirement is 715. Of course there is still time for the party to regain its status for 2020.
Rocky De La Fuente founded the American Delta Party. It qualified in Delaware in September 2016, but it obtained its registrants too late for the party to nominate anyone that year, so it hasn’t yet placed any nominees on the Delaware ballot. It had enough registrants in 2018 but it didn’t nominate anyone.