December 18 was the deadline for presidential primary candidates to file in Ohio. Here is the list, from the Secretary of State’s web page, which mixed Democrats and Republicans together. Fourteen Democrats and two Republicans filed.
No one filed in the Libertarian presidential primary. Candidates need a statewide petition and then small individual petitions for delegate candidates.
No De La Fuente.
Ohio doesn’t allow/require minor parties to participate in presidential preference primaries. The Ohio LP is holding it’s own online caucus. See: https://lpo.org/libertarians-hold-online-presidential-caucus/