"Republicans argue that since their observers couldn’t watch the vote count, they can’t provide that evidence and have asked for discovery. Still, while the courts have agreed that irregularities have occurred, they weren’t willing to grant discovery unless Republicans first present enough evidence of fraud to overturn the election. Republicans thus faced a kind of Catch 22."
Source: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3756988