Here is a critical difference between Obama and Trump: One was a know nothing community organizer and the other, a super successful, big business, CEO. Nothing demonstrates the difference between the two men that the use of Executive Orders.
Trump uses Executive Orders and Memos to direct activity per one of his 16 cabinet Secretaries, but, depends on process and legislation to cement his change orders.
Barack Obama used Executive Orders/Memos to circumvent the legislative process,ignoring the need for legislation . . . . . making it profoundly simple, in terms of process, to take down most of what he claims as "legacy." The Iranian deal was not a contract of any kind. The Paris Climate Agreement, again, was not a ratified contract and is not an enforceable agreement. His attack on coal was all about agency regulations, regulations that can be reversed by the incoming department heads. His decision to weaken the military was a matter of administrative priorities based on a manufactured budgetary decision called "sequester." Get rid of sequester, and increases in military funding can be put back in place (the military suffered more than $700 billion in cuts over the Obama Error).
Note: Contrary to popular media propaganda, "sequester" was Barack Obama's idea, a threat he issued to the GOP in the face of GOP opposition to some of his budgetary concerns.
When you hear that the Prez has taken down "x" number of environmental regulations, the truth of the matter is this: Trump's Orders/Memo's are directives addressed to an appropriate agency, instructing that agency to review/investigate a specified group of regulations for the purpose of cancellation and/or the formulation of specific legislation. In other words, our president is using existing law and process to get things done.
By contrast, Barack refused to follow "process," choosing, rather, to function like a dictatorial tribal chieftain or third world authoritarian. In fact, he complained that he could not rule apart from Congressional review. He really failed to grasp the import of this fact: That without legislation, his "legacy" was/is doomed under the Trump Administration.
Why did Obama commit to a process that innately invited a short life? 1) Because he had no clue how to negotiate his ideas into legislative law, and 2), he was convinced that Hillary would win the election. Her success was critical to Barack Obama's established legacy. Another eight years under Hillary, would have made the rejection of Barack's "temporary" orders impossible to untangle.
If Trump cannot get legislation passed into law, supporting his orders, his legacy will suffer the same demise.
Hail to the Chief.