Second, no, the relevant rate for any complaint is not the “regular room rate” at a Trump hotel, but rather the standard room rate of an equivalent hotel. Trump Hotels trade off the name and regularly charge 50% more than nearby high-end hotels.
First, the Constitution and case law on the matter does not say anything about giving a special…

Mayflower charges around 300$ for an equivalent room to the trump hotel which charges around 350$ — and the Trump room is bigger, as well as being newer and looking nicer.

This isn’t a clear cut thing. You can make it seem like it is, but it isn’t.

What kind of corruption would be be seeing with Clinton? None, because it is all done in secret. If there’s funny business going on with foreign governments and Trump businesses, the press will be all over it.