President Joe Biden blocked the $14 billion takeover of US Steel by a Japanese rival.The deal would create "risk for our national security and our critical supply chains," the president said.President-elect Trump had also expressed opposition to the Nippon Steel deal.Shares in US Steel fell about 8% in premarket trading on Friday after President Joe Biden blocked a $14 billion takeover by Nippon Steel.Advertisement In a statement, Biden said a committee of national security and trade experts had found that ...