Ban Select Alien Immigrants – Democrats Already Have
8 USC §1182 (f) Suspension of entry or imposition of restrictions by President. Whenever the President finds that the entry of any aliens or of any class of aliens into the United States would be detrimental to the interests of the United States, he may by proclamation, and for such period as he shall deem necessary, suspend the entry of all aliens or any class of aliens as immigrants or nonimmigrants, or impose on the entry of aliens any restrictions he may deem to be appropriate.
Of course, the Democrats are the ones who gave themselves that power.
Now that Republicans want to use it it's racist.
Just like Trump was fine when he was donating to the Democrats, or when he had a TV show on their stations, but now that he is running as a republican he's a long time racist alt right nutjob.