“Presidents have pardoned lots of people in the past convicted in state courts.”
Which president, which state and who were these people that were pardoned by a president for charges or convictions in state courts?
Do a google search. You will find your answers.
Here is just 1 example:
Frederic B. Ingram – Heir from Tennessee, convicted of bribing government officials in Illinois in 1977; jailed for 16 months.[30] His sentence was commuted by Carter in December 1980.