NAFTA was put into force at the beginning of 1994, which, coincidentally, is when the two charts above begin. The top panel shows total US exports to Mexico, while the bottom shows total US exports to Canada. Between the years 1994 and 2017, total exports to Mexico increased 8 fold while those to Canada were up 3 fold. In other words, there were also clear winners on the US side.
There are problems with trade -- there always are. But there are also benefits, which have been greatly overlooked over the last few years.