I have been getting bombarded with spam over the last several weeks. It makes moderating the comments rather difficult.
In addition to moderating comments, I have turned on a feature that will require you to take a step to help ensure that you are a real commenter and not a spam-creating machine.
I thought this problem would go away shortly on its own - as it has in the past. It has not. I apologize for any inconvenience; after a time, I will remove this extra step to test if this inundation has finally passed.