This narrative is bullshit. Modern propaganda has been in use in the US since the early 20th century. A lot of what you see in your everyday life is propaganda of some sort. Advertisements, media, news, etc. are all trying to sell you on something while not telling you the whole truth. Propaganda doesn't typically look like some Nazi posters from WWII (although that is a form of it), it's generally much more subtle these days. This tweet is propaganda but not even very subtle. It is misleading readers into thinking there is some difference in propaganda before and after Obama, when in reality nothing has changed, we've always been surrounded by it.