From caucuses to legislative agendas, Congress is organized along party lines. This is because a congressperson’s position of power is determined by his or her party’s leadership, and that position of power usually reflects the support and votes each member has given or promises to give to support his or her party. Political parties determine who gets what in Congress, ultimately deciding, for example, which individuals receive which office and committee assignments and how budgets and earmarks are made. Congressional offices can range greatly in size (and desirability); some are single rooms divided into cubicles overlooking air conditioning units, while others are six-room suites overlooking the Washington Mall. Budgets for staff, home district offices, and travel all vary according to party leadership decision-making. Party- directed committee assignments can send a congressperson to important committees that are highly relevant to that individual’s home district and re-election prospects, but can also leave a congressperson isolated (as may be the case with an assignment to an Ethics Committee or the Foreign Relations Committee). And when it comes time for a Member to add an earmark, or even introduce legislation, party support will depend on whether that member has been supportive of his or her party in the past. For this reason, when voting, Members of Congress must keep a variety of legislative concerns in mind.