Biden wants to triple China tariffs on steel, aluminum imports

President Joe Biden is calling on the U.S. Trade Representative to triple the China tariff rate on steel and aluminum imports as he makes the rounds in the key battleground state of Pennsylvania.

On Wednesday, the president will visit the United Steelworkers headquarters in Pittsburgh.

Biden's demand to raise the current 7.5% average tariff on steel and aluminum is an effort to make clear that his administration's recent warnings about China's trade practices are not empty threats.

On a visit to China last week, Treasury Secretary Janet Yellen raised concern that Chinese subsidies were creating an oversupply of clean energy products, like solar panels and electric vehicles, that would outpace domestic demand. She worried that overcapacity could be dumped on global markets at artificially cheaper prices, potentially stifling competition.

In an interview with CNBC's Sara Eisen, Yellen said that tariffs were not off the table if those overcapacity qualms went unaddressed.

Chinese officials and state media have since denied the overcapacity accusation, saying that its abundance of supply of clean energy products is a result of "constant innovations," not government subsidies.

As China shrugs off the overcapacity concerns, the Biden administration is doubling down on what it perceives as the threat to global trade.

"China's policy-driven overcapacity poses a serious risk to the future of the American steel and aluminum industry," National Economic Council Director Lael Brainard said on a call with reporters on Tuesday. "China cannot export its way to recovery. China is simply too big to play by its own rules."

Biden's escalated push to hike tariffs comes as he balances election-year politics with a fragile geopolitical landscape and