The Democratic field of potential challengers to Rep. Chris Collins continues to shrink with attorney Sean B. Bunny’s Wednesday decision to exit the contest.

The Army veteran’s withdrawal now leaves only Nicholas R. Stankevich rivaling Grand Island Supervisor Nathan D. McMurray among Democrats for the right to face the GOP incumbent in November. Stankevich, a Mumford businessman, is not addressing inquiries about his status in the race as McMurray gains strength following his endorsement last week by Democratic leaders in the eight-county 27th Congressional District.