President Donald Trump travels to Pittsburgh Friday to celebrate a deal he once vowed to oppose - Japanese steelmaker Nippon Steel’s long-announced plans to buy iconic American steelmaker US Steel.

President Trump announced Friday he'll double steel tariffs from 25% to 50% during a visit at a U.S. Steel mill in the Pittsburgh area.

President Donald Trump touts Nippon Steel’s partnership with U.S. Steel, calling it “a blockbuster agreement" that ensures the company “stays an American company."

President Donald Trump says he’s doubling the tariff rate on steel to 50%, a dramatic increase that could further push up prices for a metal used to make housing, autos and other goods.

The European Commission said on Saturday that it "strongly" regrets an announced increase of U.S. tariffs on steel imports and that the EU is prepared to impose countermeasures. U.S. President Donald Trump said on Friday he planned to increase tariffs on imported steel and aluminum to 50% from 25%,

Modified agreement keeps American control while securing Japanese investment, despite previous opposition from Trump and GOP senators.

Experts, lawmakers, and industry people—alongside Canadian officials—have issued stark warnings about Trump's plan.

Nippon Steel investors and analysts are asking if its $15-billion deal to buy U.S. Steel , backed but not yet approved by President Donald Trump, is positive for the near term, even if its hopes for strong U.