Why is Sheila Harsdorf hiding from Shelly Moore?

From RiverTowns.net comes news that a candidate forum in the recall election in the 10th Senate District has been cancelled due to Republican State Sen. Sheila Harsdorf’s refusal to attend:

AAUW members have announced they are officially canceling a 10th Senate District forum they had been attempting to organize.

Ann Gustafson, president of the River Falls branch, and Barb Peterson, the local group’s public policy chairwoman, announced Monday afternoon that they have cancelled the forum that would have been held Wednesday, July 27.

They had said last week that they still held out hope that Sen. Sheila Harsdorf would agree to participate in the forum with recall candidate Shelly Moore.

If those Republican State Senators who are facing recall elections are so proud of standing with Gov. Scott Walker as he pushed to strip collective bargaining rights from public employees, then why won’t they defend their support for Gov. Walker in public debates?