A few weeks back, Robert Higgs explained why President Trump’s concerns about the trade deficit are, at best, misplaced and how “fixing” it would lead to a much worse situation:
So, let’s consider the president’s trade policy in, as it were, its very best light. Suppose, then, that the government succeeded in eliminating the trade deficit entirely. Residents of the USA would continue to sell huge quantities of goods to foreigners but buy nothing at all from foreign sellers. The trade deficit would be not only diminished but wiped out and replaced by a huge trade surplus. Trumpian triumph!
Note, however, that such an outcome would be impossible to sustain for long even if it could be attained (which in fact it could not). Foreigners would be spending huge quantities of dollars to purchase goods from Americans, but they would have no means of earning dollars because Americans would not be buying anything from them. Foreigners could continue to make such purchases only if they received dollar credits from foreigners. But lenders would have no incentive to lend dollars to the Chinese, say, when they knew that the Chinese would have no ability to repay the loans because they would have no means of earning dollars in the future by sales to Americans. So a big U.S. trade surplus requires that totally implausible assumptions be made about international transactions in general and international lending in particular.
But apart from such practical difficulties and impossibilities, a Trumpian trade triumph, even if it could be achieved, would be a horrible objective to attain. Americans would be employing labor services, natural resources, and other productive inputs to produce goods and shipping them to foreign buyers. In exchange, they would receive nothing but bank account balances. Such a deal! Surrendering huge volumes of valuable goods and receiving in return larger numerals in people’s bank account statements, more dollars that could not be used to purchase anything, no matter how important or desirable, from abroad — all such purchases having somehow been stopped by a harebrained government and the economic ignoramus in charge of it.