another unintended consequence might be the pulling of jobs from ecologically unfriendly areas (like China) to the US where despite Trump himself, we still have the accrual of EPA progress since the 1970s when it was established under Tricky Dickie's watch. (and hopefully Nixon found it as galling then and until he passed too)
The granting of a pardon is an imputation of guilt, and the acceptance a confession of it.