Many of Trump’s sweeping promises will be hard, if not impossible, to fulfill

Two of Trump’s ideas could probably be realized as early as his first day in office: scrapping executive orders issued by Obama — including those that shielded from deportation some immigrants who are here illegally — and appointing a special prosecutor to investigate vanquished Democratic opponent Hillary Clinton.

.. “He certainly could do it, but it could have a major, devastating impact on her and would create a very bad precedent like we see in Third World countries” where election winners often imprison their rivals

.. He would have the authority to renegotiate trade deals such as the North American Free Trade Agreement that he has long railed against — and to withdraw with six months’ notice if he wished — but such a move could be catastrophic for stock markets and the economy.

.. But Trump would probably have the ability to ban a narrower group of Muslims living in certain parts of some countries controlled by Islamic State terrorists because the immigration statutes afford some discretion on national security grounds.