Trump already said he will do this.
replyhttps://www.msn.com/en-us/news/politics/trump-plans-to-pardo...
https://www.independent.co.uk/news/world/americas/us-politic...
Keep in mind that preëmptive pardons have not been upheld by the courts [1].
reply[1] https://www.criminallawlibraryblog.com/preemptive-pardons-co...
If that reached the supreme court however, precedent sadly might not matter too much.
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