POTUS has a statutory duty to protect (a) the Constitution, and (b) the American people. He also has the statutory right to forbid entry to the USA of any alien[i individual, or [i]group of alien] individuals who threaten Americans. The executive order can be criticised for being poorly formulated (imprecision of permanent residence hoders, for instance), but not for it intent.
Trump's stated intent is to safeguard Americans. What was Obama's intent in releasing 150 billion dollars to Iran and approving its nuclear development plan?
THAT could be considered unconstitutional on the most basic grounds of protecting your country and not enabling its enemies.
The silence of ALL anti-Trump posters on this issue implies consent to to the Obama plan. Iran with nukes! What has happened to the sanity, the common sense and the most basic decency of Mr. Lefty?