Mr. gregg has made an inflammatory speech denouncing the action of the government in the recent war. in this scenario, the court will uphold the governmental restrictions on his speech only:

The answer is If it is the least intrusive means to promote the government's interests
Due to the first amenemdne, our freedom of speech, event to criticise our own government is protected by the constitution.
But in special case, government could give intervention toward the freedom of speech if for example, the speech initiated riots that could ended up in violence.