An executive order applies only to the executive branch
An Executive Order would be a decree in another country. It can be applied to anything the President desires. Yes, under are system there are checks & balances & the US Supreme Court can overturn an Executive Order. Then Congress can then overturn the US Supreme Court.
I beg to differ, and if you can provide some substantiation for your assertion I would be glad to read it. The chief executive cannot simply order Terri removed from the hospice, for example.