Key will not turn, cannot start the car

Thanks Steve! Very much appreciated. I can tell you it is a hard stop. Some additional information and a question if you do not mind.
The lock cylinder has been replaced with a new one. That is what actually started this whole mess. The key would not turn and was stuck in lock position. Replaced the lock cylinder with a new one and the car started like a champ for about two days. My daughter was at a gas station and when she tried to start the car it would only turn as far as the on position. All power as expected. A cop happened to be there and he offered help. He told her it could be something with the car not in gear so he rocked the vehicle while she attempted to start. Eventually the key turned and the car started. The very next day she headed off to work and the car started, but when she tried to leave for the day the problem returned - key only turns to on. I did a bunch of research but could not find anyone with the exact problem. Most had the lock cylinder issue you mentioned.
So today I replaced the Neutral Safety Switch, but still no start. I have the ignition switch coming tomorrow.
My question is, can I just replace the white plastic ignition switch in the part you show or does the entire part have to be replaced?

Dave

Thanks, will give it a shot this weekend.