Read the article then all yourself the next question; if Assange is subject to arrest for violating the law according to the DOJ/Atty General, then do not the protections that are part of the law come with it. That is, is he not able to claim 1st Amendment protections? The question of the length of the reach of US authority comes into play and with that whether or not the Us Govt had the authority to actually issue the warrant.
As US prioritises Julian Assange arrest, UK hints Sweden comes first. https://tiny.iavian.net/gf82