Securing and Heightening the Integrity of our Elections and Lawful Democracy Act This bill amends the Homeland Security Act of 2002 to include among the Department of Homeland Security's (DHS's) responsibilities relating to intelligence and analysis and infrastructure protection the coordination of cybersecurity efforts between DHS and political campaign committees in order to: develop a program to update computer security at political campaign committees, share information on cybersecurity risks with such committees, provide guest lecturer programs in which professional computer security experts instruct campaign professionals on how best to defend against cybersecurity risks, and establish an Election Security Board of Advisors to make recommendations about securing elections against cybersecurity risks.