1966 Pontiac Lemans Problem shifting

I was just out driving to the store. When I got back in the car, I could not shift out of park. After a couple of attempts it did shift. I got home, pulled in the garage, and attempted to shift into park - no dice.

I have not experienced this before with the car. It almost feels like an obstruction in the center console but I have no idea.

Any help and ideas are greatly appreciated!

Mike