'In their mind' defense is not going to fly. Certainly not in the face of judicial rebukes of his cases and numerous instances of people in his own administration telling him that there was nothing there to support his beliefs.
So, immunity will fall apart in the face of the prosecution's 'what would a reasonable man do with the information that Trump was provided with?' Barr and Pence were at least two such men in this instance and 'bullshit' and 'I can't do that' were their responses.
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