So when they converged at the Horseshoe Las Vegas for the R.N.C.’s winter meetings this week, neither got official recognition. Organizers relegated Ms. Karamo and Mr. Hoekstra to guest credentials, barring them from voting on party resolutions amid a continuing review of who is the rightful chair.
Mr. Trump endorsed Mr. Hoekstra for the post on Friday, but that seems not to matter much to Ms. Karamo.
“The reality is I’m still legally the chair,” she said in radio appearance on Monday.
Lawyers for the R.N.C. reached a different conclusion last week, writing in a letter that it looked as if Ms. Karamo had been “properly removed” by a group of state committee members on Jan. 6. The R.N.C. later replaced her photo in an online gallery of state party leaders with a grayed-out avatar and the word “vacant.”
In a letter to R.N.C. members on Tuesday, and in the Monday radio spot, Ms. Karamo repeatedly lashed out at the national party and its leader, Ronna McDaniel, who is from Michigan. She accused the R.N.C. of “colluding” with a minority of members of the state committee. She compared the situation to a “country club.”
Ms. McDaniel declined to comment through a R.N.C. spokeswoman.
Ms. Karamo’s critics say that the Michigan party has been shrouded in secrecy under her leadership and is strapped for cash. Mr. Hoekstra said he had not been able to access the party’s financial records, which he described as being tightly controlled by Ms. Karamo. So have the party’s email account and website, he said, so he is having new ones developed.