On January 11, Illinois state representative Rosemary Mulligan withdrew from the Republican primary ballot, in the face of a challenge to her primary petition. See this story. She will run as a write-in candidate in the Republican primary. She needs 500 write-ins. No one else is on the Republican primary ballot in her race, which is in the 55th district.
She has been in the legislature since 1992. In November 2010, she was re-elected with 67.6% of the vote. This example shows the absurdity of the idea that voter support for a candidate should be equated with his or her ability to complete a petition. It is very likely she will receive the needed 500 votes in the Republican primary to win a place on the November ballot. If she does not, the lone Democratic candidate will probably be the only name on the November ballot. Thanks to Ken Krawchuk for this news.