Per GROK…
He who pledges war against the United States could potentially be in violation of several laws, most notably:
18 U.S. Code § 2381 - Treason: This law states that whoever, owing allegiance to the United States, levies war against them or adheres to their enemies, giving them aid and comfort within the United States or elsewhere, is guilty of treason.
18 U.S. Code § 2384 - Seditious Conspiracy: This statute criminalizes conspiring to overthrow, put down, or to destroy by force the Government of the United States, or to levy war against it, or to oppose by force the authority thereof, or by force to prevent, hinder, or delay the execution of any law of the United States.
These laws are part of Title 18 of the U.S. Code, which deals with crimes and criminal procedure. It's important to note that the context, intent, and actions around such a pledge would be scrutinized in legal proceedings to determine if a crime has indeed been committed under these or related statutes.
Disclaimer: Grok is not a lawyer; please consult one. Don't share information that can identify you.