Trump's border tax plan has one problem

Everyone seems to be talking about a border tax these days — but few people seem to know what they’re talking about.
One reason is the neophyte US president’s own mixed message. As he has done on multiple occasions, President Trump has taken both sides of this particular issue at various times.
On January 16, Trump said he was hesitant to impose a border tax on imported goods as part of his anti-trade push: “Anytime I hear border adjustment, I don't love it,” he sai