We have problems — very real problems — in this country, and each of them requires a sophisticated level of focus and organization that is simply not possible as long as we're thrown off of our game every single time Trump writes a ridiculous tweet. From this moment forward, I won't be responding to Trump's tweets — no matter how outrageous they may be. Enough people are already doing that. I'm going to pick the problems I aim to help solve and go about the business of solving them. Real people who need our help simply can't afford for any of us to be distracted by Trump's tweets any longer. I'm done.