No one was in the room when it happened (a little Hamilton), so where the water came from was unclear. I assumed it was the drain pump, although I never saw any water on the underside of the machine. I just couldn't figure out what was happening. I bought the pump, changed it out, and took the machine for a test drive. Standing water again... No one was in the room when it happened.
I took a chair and some reading materials and treated the laundry room like the toilet. I sat there through every cycle; something I should have done in the first place. I heard water hitting the floor; because I was in the room when it happened. I saw the water leaking from the drain pump in the wall.
I discovered that the kitchen sink would back up at the same time as the drain backing up. The standing water was due to a clogged mainline. I didn't have a snake and I didn't want to take apart the pipes under the kitchen sink which gave access to the outdoor mainline, I called a local plumbing service. They cleared the line, and interestingly enough one of the toilets, and a slow draining shower worked better.
The pump wasn't bad, but the machine is running better and all is well. Simply because I got to be in the room where it happened. (Which is important on a few levels ;-) I hope this helps someone.