Marvin E. Holmes Jr.

• Vice-Chair, Rules and Executive Nominations Committee, 2020–present
• Member, Environment and Transportation Committee, 2015–present (natural resources, agriculture & open space subcommittee, 2015–2018; land use & ethics subcommittee, 2015–present; chair, housing & real property subcommittee, 2015–present)
• Member, Joint Committee on Administrative, Executive and Legislative Review, 2015–present
• Member, Environmental Matters Committee, 2003–2015 (local government & bi-county agencies subcommittee, 2003–2006, 2011–2015; motor vehicles & transportation subcommittee, 2003–2006; housing & real property subcommittee, 2003–2010; affordable housing work group, 2004; motor vehicle issues work group, 2004; land use & ethics subcommittee, 2006–2015; ground rent work group, 2007; co-chair, housing for individuals with disabilities work group, 2004; chair, natural resources subcommittee, 2007–2015)
• Deputy Majority Whip, 2006–2010
• Member, Joint Legislative Work Group to Study State, County and Municipal Fiscal Relationships, 2009–2010
• Vice-Chair, House Emergency Medical Services Work Group, 2009–2012
• Member, Business Climate Work Group, 2013–2014
• House Chair, Joint Committee on Legislative Ethics, 2015–2017

• 2nd Vice-Chair, Prince George's County Delegation, 2003–2010 (vice-chair, 2017; law enforcement & state-appointed boards committee, 2008, 2015–2016; washington suburban sanitary commission committee, 2008–2012; vice-chair, bi-county committee, 2018–present, member, 2003–2007, 2013–2014)
• Member, Legislative Black Caucus of Maryland, 2003–present (historian, 2011–2012)
• Member, Maryland Green Caucus, 2003–present
• Member, Maryland Veterans Caucus, 2005–present
• Chair, Democratic Party Caucus, 2011–2015
• Member, National Conference of State Legislatures (legislative effectiveness & state government committee, 2005–2007; legislative effectiveness committee, 2007–present)

Following the 2021 United States Capitol attack, Holmes compared Donald Trump to Adolf Hitler, stating "What's going on, unfortunately, is the start of anarchy proposed and accelerated by Trump. We only need to look at how Hitler came into power by chipping away at a society by having others enacting his dominance. It's similar to how slavery became law; one statute at a time by those that have power, in an attempt to increase the powerlessness of those that they wish to dominate."[3]

In 2012, Holmes voted against legislation to expand gambling in Maryland; the bill passed the House of Delegates by a vote of 71-58 and was signed into law on August 15, 2012.[4]

Holmes introduced legislation during the 2019 legislative session to lower the state's lead exposure threshold from 10 to 5 micrograms per deciliter, the Centers for Disease Control and Prevention's reference level that demonstrates elevated lead levels in children. The bill passed and was signed into law by Governor Larry Hogan on April 30, 2019.[5][6]

In 2012, Holmes voted for legislation to raise the state's fuel tax to replenish the state's transportation fund.[7][8]