>>12250998Linda was in his cabinet, and was largely a failure. This may have soured his relationship with Vince. Alternatively, Vince and Linda separating may have soured his relationship with Vince if he saw it as a betrayal. Either way, I think Linda's low level cabinet position was to blame.
That said, I unironically believe that Trump owes a large portion of his political career to what he learned from Vince as it pertains to heel tactics and carnyism. People blame the Apprentice, but he was only reading lines there. It was his interactions with Vince that granted him access to a masterclass in public media manipulation.