Is there such a thing as treason against a US state?

Yes. The abolitionist John Brown was charged with treason against the Commonwealth of Virginia for his 1859 raid on Harpers Ferry. He and others were, of course, convicted and hanged. John Brown (abolitionist) - Wikipedia. read more

A brief overview of the dim view they take of treason is provided by Wikipedia here: Treason laws in the United States - Wikipedia The penalties range from death to x number of years in prison. Louisiana, for example, includes the death penalty, but if the person is sentenced to life in prison, no parole is possible. read more

"Treason against the United States shall consist only in levying war against them, or in adhering to their enemies, giving them aid and comfort. No person shall be convicted of treason unless on the testimony of two witnesses to the same overt act, or on confession in open Court. read more

Thomas Jefferson in 1791 said that any Virginia official who cooperated with the federal Bank of the United States proposed by Alexander Hamilton was guilty of"treason" against the state of Virginia and should be executed. The Bank opened and no one was prosecuted. read more