President-elect Joe Biden named former Federal Reserve Chair Janet Yellen as his Treasury secretary nominee on Monday, and named three women to other top economic posts, setting the stage for a more diverse White House. While Biden’s transition to the presidency on Jan. 20 appeared to be hitting its stride, he himself was hobbling after fracturing his foot while playing with his dog on Saturday and will wear a protective boot for several weeks, his doctors said. The incoming administration has been hampered for weeks by Republican President Donald Trump, who has refused to concede to Biden, a Democrat. Trump has said without providing evidence that the Nov. 3 vote was fraudulent, claims that state and federal election officials have dismissed. Biden named leading members of an economic tea...