Washington (CNN)More Americans believe special counsel Robert Mueller's investigation is justified than politically motivated, according to a CBS News poll released Wednesday, the first time the survey has found more Americans hold that belief. According to the poll, the percentage of Americans who believe the investigation is justified stands at 50% while 45% believe it is politically motivated. The numbers represent a change from where they stood in late November, when CBS found that 46% of Americans thought the investigation was justified and 51% believed it was politically motivated. Helping drive the numbers is an increase among Democrats who now...