SCRANTON, Pa. (AP) — President Joe Biden is calling for a tripling of tariffs on steel from China to protect American producers from a flood of cheap imports, an announcement he planned to roll out Wednesday in an address to steelworkers in the battleground state of Pennsylvania.

The move reflects the intersection of Biden’s international trade policy with his efforts to court voters in a state that is likely to play a pivotal role in deciding November’s election.

The White House insists, however, that it is more about shielding American manufacturing from unfair trade practices overseas than firing up a union audience.

In addition to boosting steel tariffs, Biden also will seek to triple levies on Chinese aluminum. The current rate is 7.5% for both metals. The administration also promised to pursue anti-dumping investigations against countries and importers that try to saturate existing markets with Chinese steel, and said it was working with Mexico to ensure that Chinese companies can’t circumvent the tariffs by shipping steel there for subsequent export to the U.S.