1999 Mercury Cougar V6 2.5l  
Scenario 1: Hands on Wheel 
Pulls very hard to the left when braking.  After letting off the brakes - the car will immediately straighten itself out. 
  
Scenario 2: Hands off the Wheel 
If traveling in a straight line - Wheel turns to left when braking as if some kind of auto pilot has been engaged, but the vehicle continues in a straight path.  After letting off the brakes - the wheel straightens out.  Once again, maintaining a pretty straight path. 
  
Obviously Scenario 2 is undoubtedly dangerous.  We have temporarily learned to counter steer while braking.  Terrible thing to have to learn. 
  
  
  
Any thoughts on where I should begin? 
One of Front Struts?
Rack or Rack bushings?
Tie-rods?
I’ve already replaced Calipers, Pads and Rotors all the way around the car.  My initial thought was a hanging caliper.
Kind regards