These tweets were collected for the third Democratic Party Debate held on September 12, 2019 at Texas Southern University in Houston, Texas. The official hashtag #demdebate was collected from the Twitter filter stream API using twarc from 2019-09-12 15:44 to 2019-09-14 10:09 UTC. The API reported that 195,725 tweets were not delivered due to rate limiting during high volume periods. The total number of tweets collected was 1,280,956 tweets. This dataset was created as part of a collaboration between the Maryland Institute for Technology in the Humanities and the Department of Communication at the University of Maryland.