Trump just shot himself in the foot.
I don't know how much the rest of you know about presidential appointee culture (I'm an expert), but honor and shame are huge parts of it. It's not like it is in business where you can become successful by being an asshole. If you screw someone over in American politics, you bring shame to yourself, and the only way to get rid of that shame is repentance.
What this means is the American public, after hearing about this, is not going to want to support Trump as President, nor will they support any of Trump's agenda. This is HUGE. You can laugh all you want, but Trump has alienated an entire market with this move.
Trump, publicly apologize and rehire Preheet Barkara to her job or you can kiss your political career goodbye.