President Donald Trump’s federal housing finance director, Bill Pulte, quietly granted government-backed lenders the authority to nearly double a $200 billion bond purchase that Trump ordered to try to lower mortgage rates, a move that could introduce a new level of risk for the companies.An email obtained by The Associated Press that was sent by the Federal Housing Finance Agency to top officials at Fannie Mae and Freddie Mac eliminated caps that prohibited the lenders from each holding more than$40 billi ...