Based on a Gallup poll taken last month, American’s view on trade is fairly split. 51% of American’s believe trade has a positive effect, whereas 42% believe trade has a negative effect on jobs for U.S workers. Despite the close split, American’s perspective has gradually become positive. From the poll, it was revealed that an increase in trade led to benefits in the US job market. Importantly, union membership does not strongly relate to how one assess the impact of trade on job opportunities, although this varies by gender and age.
See "Slim Majority in U.S. See Trade as Benefitting American Workers", The Financial, March 21, 2019