The President sets the strategy for all of the combatant commands through the National Security Strategy and ultimately every military action has a line drawn to the President through the SecDef. Saying POTUS doesn't have away over the other COCOMs is misleading at best. (To be clear, this article is still bs, having "Navy only" divers doesn't make any sense in the way operations are done in the US military.)
>>enkid+(OP)
What I'm trying to illustrate is that POTUS isn't sitting in on OPORDs, The Joint Chiefs of Staff advise the president on all military matters, the president goes through them, the Secretary of Defense, etc.