According to Marine Corps regulation MCO P1020.34F of the Marine Corps Uniform Regulations chapter 3, a male Marine is not allowed to carry an umbrella while in uniform. There is no provision in the Marine Corps uniform regulation guidelines that allows a male Marine to carry an umbrella.
You might think a commander in chief of the armed forces might be aware of the regulation. Nevertheless, during a press conference under a light drizzle with Turkish Prime Minister Recep Tayyip Erdogan this morning, President Obama flaunted his transcendence of the US Military when he allowed the First Head to be protected from the elements by an umbrella held by a male Marine corporal.
Nothing is beyond this so-called commander in chief when it comes to embarrassing armed forces in the act of protecting himself from hostile elements, such as a light rainfall. It has been reported that the White House immediately when into defensive mode, and conflicting spin-stories are emanating from both the White House and the CIA as I write this missive.