From the introduction to US Sanctions on Russia (R45415, Nov. 28, 2018):
Sanctions are considered by many to be a central element of U.S. policy to counter Russian malign behavior. Most Russia-related sanctions have been in response to Russia’s 2014 invasion of Ukraine. In addition, the United States has imposed sanctions on Russia in response to human rights abuses, election interference and cyberattacks, weapons proliferation, illicit trade with North Korea, support to Syria, and use of a chemical weapon. The United States also employs sanctions to deter further objectionable activities. Most Members of Congress support a robust use of sanctions amid concerns about Russia’s international behavior and geostrategic intentions.