If Trump's supporters can rally behind that contradiction in "America First" trade policy, they deserve a "10" in mental gymnastics, or perhaps a prize for excellence in Bobby McFerrin governance: "Don't worry, be happy," or as Trump sang it in a later tweet, "Be cool, it will all work out!"
Does Trump believe that? Who knows. But he's beginning to learn that unilateral pronunciamentos in a multilateral world aren't so easy to carry out.
What's particularly odd in this case is that the president actually had good national-security reason to penalize the Chinese firm of ZTE, since it had been violating trade sanctions against North Korea and Iran. But wouldn't you just know it? In this one justified case of coming down hard on a foreign firm, Trump reversed himself. Thus he's established precedent, and now, as the NY Times notes, "It might … diminish the future effectiveness of such controls when applied to other companies."
So even when Trump is right, he's wrong.