On December 5, at 5 pm central time, filing closed for Republicans running in the Illinois presidential primary. Candidates needed 3,000 signatures. The Illinois State Board of Elections web site shows that the following Republicans filed: Rudy Giuliani, Mike Huckabee, Alan Keyes, John McCain, James Creighton Mitchell, Ron Paul, Mitt Romney, Tom Tancredo, and Fred Thompson.
The web site shows that Mike Huckabee did not file until 4:56 pm on November 5. The State Board of Elections did not post notice that he had filed for 45 minutes. An earlier post here wondered if Huckabee had filed, but he did.