Reflecting Pool has everything. It’s a drama. It’s a farce. It’s a whodunit. It’s a murder mystery. The victims are ducks. Reflecting Pool is entertainingly low stakes because it is not, for example, a war. The worst-case scenario is that the United States is out several million dollars and that Lee Greenwood has to sing “God Bless the U.S.A.” at the “Rally to End All Rallies” — Is that a promise? — in front of a body of water that currently looks like why God Blessed Tetanus Shots.