Lawmakers are returning to Congress on Monday following a racist series of tweets from President Donald Trump aimed at four Democratic lawmakers, and Republican leaders as well as rank-and-file members are feeling the pressure to weigh in on the President's comments. But many leaders in the party are so far not weighing in publicly -- including Senate Majority Leader Mitch McConnell. "If he issues a statement on this we'll be sure to forward," said McConnell spokesman David Popp in response to a question from CNN. While many Republican leaders in Congress have thus far not spoken out, some GOP members...