The National Infrastructure Protection Plan (NIPP) 2013, involving stakeholders from all 16 critical infrastructure sectors, all 50 states, and from all levels of government and industry, provides a clear call to action to leverage partnerships, innovate for risk management, and focus on outcomes, provides an updated approach to critical infrastructure security and resilience, and involves a greater focus on integration of cyber and physical security efforts. (DHS, NIPP Fact Sheet).
Source: Starting Point: U.S. Election Systems as Critical Infrastructure, U.S. Election Assistance Commission, https://www.eac.gov/sites/default/files/eac_assets/1/6/starting_point_us_election_systems_as_Critical_Infrastructure.pdf