During the darkest days of the campaign, when Trump trailed Hillary Clinton by wide margins in just about every poll, Trump's campaign staff searched hard for some good news to print out and place on their boss's desk.

One trusty source of good news: the Rasmussen Reports polls, which historically tilt Republican.

Today, the President, who's been concerned about his approval ratings, retweeted a rare burst of good news — "Trump approval hits 50%." The source of this information will be no surprise to Trump's campaign staff.