Why does my starter not disengage after the engine starts??

What is your question?

Soo when we start the car the key works fine and it starts the vehicle but the starter stays engaged and the car shakes quite violently. It seems to get worse when the vehicle warms up.

What makes this problem better or worse?

When the engine is warm

How long has your 2008 Dodge Nitro had this problem?

Got worse in the last 2 weeks