PHILADELPHIA — President Joe Biden has named Rosie Rios, who was U.S. Treasurer under President Barack Obama and more recently cohost of the Unicorn Hunters business-entertainment show, to succeed Philadelphia developer Dan DiLella as chairman of the government’s U.S. Semiquincentennial Commission, which is planning America’s 250th anniversary. DiLella, who presided over the commission’s sometimes stormy first four years, is “still on the board. I’m still involved. But I’m not a Democrat, and they had to get one,” DiLella told The Inquirer. “I’m surprised I was in that position so long.” There…
