Earmarks help to create congressional stability  In a system with a two-yearly election cycle, a certain element of incumbent advantage provides stability and continuity in the legislature (and re-election rates have been sharply down in both 2008 and 2010). Many other factors promote incumbency, including the media attention a Congressmen rightly receives back home, perks of office such as large staffs and generous travel expenses, redistricting, and the ability of an incumbent to call upon an existing network of volunteers and donors to support their re-election bid. In any case, earmarks are only a tiny share of overall spending, and donations from local interest groups are usually heavily outweighed by both individual contributions and those from national organisations. Their money goes to candidates who share their ideological position and who they feel will vote to support the major legislative and budget initiatives they favour.