Update: With the mower lifted, I slowly spun the blades by hand. I can feel and hear a spot it's catching.
I suspect I may have damaged the bottom spindle bearing or possibly both spindle bearings.
I am ordering a new bearing loaded spindle and some extra bearings for my original spindle.
Also since I'll have the belt off I am going to replace the belt as well just in case.
Also I am buying some yard flags to mark off all of the stump locations.
All of this problem is my fault. I cut down some small trees recently and tried to cut them as close the the ground as I could get them with the chainsaw. My idea was that I would not hit them if I cut them low. That was dumb because all I did is hide them from view so I could damage my brand new mower! I will be picking up some yard flags to mark the location until I can get them all ground down.