The Danish royal family travel on commercial airplanes in Denmark just like everybody else.
That may be true, but I'm not excited about the prospect of having the POTUS on my next flight to Disney World. I'd rather be on a plane full of no-name folks not attracting any attention.
High unemployment.
Stagnating economy.
15 trillion of debt our children will have to pay (we just passed 100% GDP with no end in sight.)
You do realize that the economy started tanking before he even took office?