Bullshit.
https://en.wikipedia.org/wiki/Supremacy_Clause
SCOTUS overturns state laws and convictions plenty.
State criminal case: https://oklahomavoice.com/2025/02/25/u-s-supreme-court-tosse...
State laws held unconstitutional: https://law.justia.com/constitution/us/state-laws-held-uncon...