I answered the phone and said "Hello", no response so I hung up.

Don't bother answering it again. It's the UAW, begging people to vote for the Democrats.

This number has called me 3 times over the past week. Never leaves a message either.

first time called, left no nessage

I called the number back and he said they needed to talk to the person that handled my DTE energy bill. I told him it was a business line and to remove my number from their list. We'll see what happens, but I am doubtful...