The WSJ cites a trader who asserts that

“A shift towards a ‘weak dollar policy’ is at odds with the imposition of tariffs (which tend to lead to exchange-rate appreciation—ignoring for the moment the possibility of retaliation),” said Vasileios Gkionakis, London-based global head of FX strategy at UniCredit Bank, in a note. ”And needless to say, a stronger [U.S. dollar] is difficult to reconcile with the creation and protection of manufacturing jobs domestically. So the market smells political inconsistency…and this is happening at a difficult point for the dollar.”

Use the Mundell Fleming Model to see if you can replicate the trader’s reasoning