WATCH: Biden delivers remarks during campaign event at IBEW union conference

President Joe Biden delivered campaign remarks at the IBEW union conference on Friday.

Watch Biden’s remarks in the player above.

Biden has made multiple visits to union events as part of his re-election campaign for president. Last Wednesday, Biden suggested to cheering, unionized steelworkers that his administration would thwart the acquisition of U.S. Steel by a Japanese company, and he called for a tripling of tariffs on Chinese steel, seeking to use trade policy to win over working-class votes in the battleground state of Pennsylvania.

The Democratic president’s pitch comes as Donald Trump, his likely Republican opponent, tries to chart a path back to the White House with tough-on-China rhetoric and steep tariff proposals of his own.

During a visit to the Pittsburgh headquarters of United Steelworkers, Biden said U.S. Steel “has been an iconic American company for more than a century and it should remain totally American.”

Administration officials are reviewing the proposed acquisition of U.S. Steel by Japan’s Nippon Steel, and Biden said last month he would oppose the deal, saying it was “vital for it to remain an American steel company that is domestically owned and operated.”

But in front of a union audience, he went much further in pledging he may block it.

“American-owned, American-operated by American union steelworkers — the best in the world — and that’s going to happen, I promise you,” he said.

In another step that his administration argues can protect domestic steelworkers, Biden also announced that he will push for higher tariffs on Chinese steel and aluminum, aiming to insulate American producers from a flood of cheap imports.