Yes, the Maryland state democratic party platform does include marriage equality.
Democratic Union Party was created in 1947.
Democratic Party - Singapore - was created in 1955.
Primarily Democratic.
Populist Party of Maryland was created in 2004.
Maryland Green Party was created in 2000.
Libertarian Party of Maryland was created in 1971.
Labour Democratic Party was created on 1943-09-08.
Party for Democratic Prosperity was created in 1990.
Sandžak Democratic Party was created in 1995.
Saguan Democratic Party was created in 1899.
Lithuanian Democratic Party was created in 1902.