When Marylanders go to the polls tomorrow to vote in the presidential primary, their concerns will represent many of the interests and issues at play in the national campaign. As this map represents, the state has a major urban area, growing suburban communities clustered around Washington, D.C., and largely rural areas in the west and on the Eastern Shore. The economy taxes , the role of the federal government, environmental issues and national security are much on the minds of Marylanders -- liberals, conservatives and moderates.