Definition: Given a 'poster' sentence and a corresponding 'response' (often, from Facebook or Reddit)classify the sentiment of the given response into four categories: 1) Positive, 2) Negative, 3) Neutral, and 4) Mixed if it contains both positive and negative.
Input: Poster: With every new tweet and comment, it's clear that there is no one who is undermining the legitimacy of the Trump presidency more than Donald Trump himself.  Responser: Rep.Adam Schiff just said a mouthful !!
