Economists and policymakers are debating whether stimulus spending and easy monetary policy are fueling inflation. Many businesses say there is another culprit that should share the blame: import tariffs.

The Trump administration implemented tariffs on products including lumber, steel and semiconductors to shield American companies from a glut of cheap imported products from China and other countries.

The tariffs have long been opposed by U.S. companies that import the goods and pay the levies. They are making a new push for the Biden administration to lift them, on grounds that tariffs contribute to rising prices and product shortages that are accompanying the post-pandemic recovery.