That’s not correct. If you say find a cache of classified documents on the street or on some open FTP site and you sell it to China or leak it to the public you

That’s not correct. If you say find a cache of classified documents on the street or on some open FTP site and you sell it to China or leak it to the public you’ll be charged under the espionage act. In general distribution of classified materials even those which have already been leaked is technically an offense. The question is how likely you are to be prosecuted and in general found guilty. So sharing a photo of a leaked document that was already been made public especially in the press on Twitter is probably ok form a legal perspective (unless you hold or plan to hold security clearance or a federal government job) but being in on it from the get go would likely land you a charge as a co conspirator under the espionage act.