S. Rept. 116-290: Russian Active Measures Campaigns and Interference in the 2016 U.S. Election, Report Volumes I-V Together with Additional Views [open pdf - 71MB]
Alternate Title: S. Rept. 116-290: Russian Active Measures Campaigns and Interference in the 2016 U.S. Election, Report Volumes 1-5 Together with Additional Views
From the Introduction: "From 2017 to 2019, the Committee held hearings, conducted interviews, and reviewed intelligence related to Russian attempts in 2016 to access election infrastructure. The Committee sought to determine the extent of Russian activities, identify the response of the U.S. Government at the state, local, and federal level to the threat, and make recommendations on how to better prepare for such threats in the future. The Committee received testimony from state election officials, Obama administration officials, and those in the Intelligence Community and elsewhere in the U.S. Government responsible for evaluating threats to elections."
S. Rept. 116-290; Senate Report 116-290
U.S. Government Publishing Office: http://www.gpo.gov/