This report presents the findings of a research project measuring the scale of online abuse targeting a variety of Congressional candidates in the 2020 US election. It found that women and candidates from an ethnic minority background are more likely than men and those who do not have an ethnic minority background to receive abusive content on mainstream social media platforms (Facebook and Twitter). It provides some recommendations and next steps which should be taken by technology companies and policymakers to protect candidates who are more likely to be targeted online and receive abusive content.