The ball is now in the court of Rep. Mark Kirk (R-Ill.); Illinois GOP party chairman Andy McKenna just issued a statement saying that if Kirk runs for the Senate, he won't.
Statement from ILGOP Chairman Andy McKenna
"As Party Chairman my goal has been to build Party unity. Mark Kirk and I met last evening as part of an ongoing discussion about the U. S. Senate race. I reassured Mark that if he chooses to be a candidate, I will not oppose him."