They can't speak out while in the service, but you can bet that their time will come when they are out. Obama’s legacy will be the worst in history, and these brave service members will gladly help write the list of reasons why this will be so.
Bless them all.
As a military officer, I administer re-enlistment oaths to enlisted and advancement oaths to officers. Enlisted personnel take an oath to obey the orders of the president, officers do not. The founding fathers believed that military officers would be the last people to defend the constitution in the face of tyranny. Officers only take an oath to defend the constitution.