But if Haley allows herself to be upended by Trump and his lieutenants over chemical-weapons-related sanctions, she will be seen as a paper tiger and, worse, a stooge of the Russia-loving President and, indeed, of the Kremlin itself.

Already, Haley has shown that she is not a pushover. But one tweet is not enough.

Now is the time for Haley to do the hard thing—but the right thing for the country and for herself: Get out and show that America still has leaders whose outrage at the slaughter of innocents will not be silenced. Get out before her very bright future is sullied by the Trump Taint.