Tonight marks the third presidential debate, in which Hillary Clinton and Donald Trump are set to square off one final time before Election Day. The debate comes on the heels of more Trump-fueled controversy, as eight women have accused the Republican nominee of sexual harassment in the last ten days. Hillary, meanwhile, has been fighting her own battles over a deluge of personal emails exchanged by campaign staffers and made public by WikiLeaks. With three weeks remaining until ballots are cast, it's a race to see who can bleed the least.

Starting at 8:15 PM EST, we’ll be updating this page as Twitter reacts to the presidential debate in real-time. Every five minutes, we’ll take in a sample of thousands of tweets about the candidates from regular Twitter users and scoring them with a “sentiment analyzer." If a high proportion of the words in a tweet carry a positive meaning, the tweet will be scored more positively; if more of the words are negative, the tweet will be scored more negatively. Each tweet will receive a score from -1 (most negative) to +1 (most positive). By averaging the sentiment of tweets across each five minute interval, we can track how opinion on Twitter is evolving over time.

UPDATE: The final presidential debate has ended. We've preserved the results of the live tracker below.