In this talk, Bruce A. Desmarais shares results from the Digitally Accountable Public Representation (DAPR) project, in which they track the daily online posts of 20,000+ U.S. elected officials across different platforms. After a brief overview of the DAPR project, he focuses on two studies of harmful content in U.S. state legislators’ posts. In the first project, they study how often legislators share links to low-credibility websites on Facebook, and who is most likely to do so. Three patterns stand out: (1) more conservative legislators share more low-credibility links; (2) this tendency is stronger in districts where the public is more conservative; and (3) legislators in states with better-resourced, more professional legislatures share fewer such links. These results are robust across a variety of alternative tests. In the second project, they examine how harmful content affects engagement with legislators’ posts. Looking at Facebook and Twitter, they study references to low-credibility sources and the use of uncivil or insulting language. For Republican legislators, posts linking to low-credibility sources draw more reactions and comments on both platforms. By contrast, uncivil language generally does not boost engagement on Twitter; our Facebook evidence on incivility is thinner. Overall, low-credibility sharing is uncommon but patterned by ideology, constituency, and institutions, and increases engagement under some conditions.