“Campaigns” are creations of State Legislatures, and they are for the purpose of guiding the Legislature in its plenary power to appoint Electors for President and Vice President.
No “rules” or “laws” made at the Federal level (by Congress OR the Executive Branch) have any sway over the processes by which the State Legislatures indirectly elect the President. The voting pertaining to Electors that takes place on the Tuesday after the first Monday in November are NOT Federal elections, they are 50 State elections to appoint State officers (the Electors).
Search the Constitution all you like. Congress has no authority over the appointment of Electors, and any laws that say otherwise are unconstitutional.
I have no idea what Electors have to do with this, so please elaborate.
Sure a state DA may bring charges. But it will be challenged 6 ways to Sunday. Can a state bring charges against POTUS? Civil suits, yes, at the convenience of the defendant. Criminal charges? Appeals apeals appeals... Then there are still the other questions: Selective prosecution, is there a crime, is there willful knowledge a crime was committed, can you flip a client’s attorney into a witness against the client? A to the latter only if they are both engaged in a crime together which they will do doubt allege but as other said this was routine Trump paid many women over the years this one is “illegal” only because he won the election.