America is an incredibly polarized country politically. I think ANY Republican would start out with 42 percent of the vote.
Is it really the right of the media to dictate to the president whom he will allow in his press conferences? That's tetchier. And then there is the added issue of whether it would be a service to their readers, and the country at large, for, say, the Washington Post to take itself out of the room -- meaning they don't have the ability to ask important questions the president is obliged to answer? I think that would be a mistake.
Nationalism and patriotism are two sides of the same coin, and the most nationalistic / patriotic country in the last 300 years was Germany during the Third Reich.