A new Reuters/Ipsos poll, conducted between April 16-21 among 4,306 respondents, shows a steady decline since the start of the year. Trump's economic approval was at 43 percent in late January; it has now dropped to 37 percent percent, a 6-point slide.

Supply chain scholars and shipping industry insiders say they're expecting higher prices, barren shelves, and job losses if trade deals are not made.