Since nobody sent a reply. I am posting an update for anyone else with the same problem.

I had a repair person come out. I found out that you can inspect the impeller of the drain pump from inside the dishwasher. First remove the screen at the bottom and manually remove as much water as you can. Then there is a plastic cover over the impeller at the bottom of the inside of the dishwasher. The cover is held in place by a couple of screws. Once the cover is removed, you can see if anything is jamming the impeller. You can also spin the impeller by hand to see if its stuck.

I didn't know you could inspect the impeller without pulling the dishwasher out of the cabinet. If you know what you are doing, it only takes a minute to remove the cover of the impeller. So, do this work yourself before calling a repair person. It can save you over $100 if the only problem is that something got stuck in the impeller.

In my case, there was nothing in the impeller. However, after the repairman spun the impeller by hand a few times, the drain pump started working again.

The pump is probably going out, so I am having the pump replaced, but the part needs to be ordered and it wont be installed until next week. So, I can test the pump this week to see if it goes out again.