Here is what I am seeing in regards to suits filed so far by the Trump campaign.
Both of these have already been dismissed
Donald J. Trump for President, Inc. v. Benson
Status: Suit dismissed by state court of claims
Issues: Whether Michigan’s constitution and election laws require that absentee ballots be counted in the presence of an “elections inspector” from each political party; and if so, whether the state should stop counting ballots until that requirement is met or separate ballots counted without representatives of both parties present.
State: Michigan
Court: Michigan Court of Claims
Donald J. Trump for President, Inc. v. Boockvar
Status: Suit dismissed by district court; additional drop-off sites, lifting of signature-matching requirement, and rescinding of ban on out-of-county poll workers upheld
Issues: Whether a number of Pennsylvania elections accommodations in light of the coronavirus pandemic providing additional drop-off sites and alleviating signature-matching requirements for absentee ballots, as well as lifting a restriction on employing out-of-county poll workers violate state election law and the U.S. Constitution.
State: Pennsylvania
Court: U.S. District Court for the Western District of Pennsylvania
The MI case goes Federal and the PA case goes to SCOTUS