President Donald Trump's tariff policy has failed to catch on in three states critical to this year's midterm elections.

A solid plurality of adults in Pennsylvania, Texas and Illinois say the duties will raise the cost of consumer goods and hurt the U.S. economy, according to NBC News/Marist polls released this week. The results do not bode well politically for Trump, who won the White House in part by promising to crack down on unfair trade practices and revive manufacturing in states such as Pennsylvania.