However, a recent Gallup poll conducted in February suggest that although Americans became more likely to see trade as a "threat" than as an "opportunity" from about 2001-2008, since the Great Recession of 2007-2009, a rising share of Americans have started to viewing foreign trade as an opportunity. Here's a graph from Gallup:
However, I feel considerable uncertainty over how to interpret these findings. For example, it's not clear to me why Democrats and Independents are shifting their opinions about trade more strongly than Republicans. This shift doesn't seem to reflect the political divisions in Congress, where it seems that Republicans are more often the ones to be pushing for agreements to reduce trade barriers and Democrats are more likely to be opposing them.