4) The US President is not well. He saw that the stock market went down, so he tweeted a thing. This then became policy simply because he tweeted a thing. As the US lurches from crisis to crisis, this will be forgotten, as many things have before [0,1,2], and there is not a good chance that the thing will be enacted.
[0] https://www.washingtonexaminer.com/opinion/trump-keeps-makin...
[1] https://time.com/5175729/donald-trump-broken-promises/
[2] https://www.washingtonpost.com/business/2019/08/06/trump-is-...