Until 2009, a qualified political party in Illinois had the freedom to nominate someone by a party meeting, if no one had been nominated earlier in that party’s primary. But in 2009 the Illinois legislature passed a bill saying that such post-primary nominations are no longer permitted, unless a petition is submitted for the nominee. Governor Pat Quinn had vetoed this bill, but the legislature had overwhelmingly overridden his veto.
This year, the Republican Party submitted such a petition for its nominee for State Senate, 43rd district, Cedra Crenshaw. However, the Crenshaw petition had a slight technical error, so the local Board of Elections has removed Crenshaw from the November ballot, and only the Democratic nominee is now on the ballot. Crenshaw will try to reverse the ruling in court. Thanks to Bill Van Allen for this news. See this SouthTown Star editorial, deploring Illinois ballot access rules.