In the legislature, Morhaim served on numerous committees including Environmental Matters Committee, 1995-2003; Health and Government Operations Committee, 2003-17; Judiciary Committee, 2017-19; Joint Committee on Administrative, Executive and Legislative Review, 2003-19; Joint Committee on Health Care Delivery and Financing, 2007-14; Joint Information Technology and Biotechnology Committee, 2009-14; Joint Committee on Transparency and Open Government, 2011-14; Joint Committee on Cybersecurity, Information Technology, and Biotechnology, 2014-19; Joint Committee on Legislative Information Technology and Open Government, 2015-19; Joint Committee on Behavioral Health and Opioid Use Disorders, 2015-19. Morhaim sponsored numerous bills focusing on health care, environment, and procurement reform.
