Well, the best way to begin looking at this problem is by recognising that a majority of people did not support the war of the American rebels! One third famously gave their support against Britain, while one third actively supported the British. And the remainder had divided loyalties. So the newspapers would have reflected that. And the tax which incensed many people on stamps was also accompanied by one on news papers. So many newspaper owners resented this understandably. Overall the picture is varied with some local papers actively supporting the propaganda effort against the British, with some famous pro-British men setting up newspapers to couteract the rebel's cause.