Interest groups attempt to influence government through lobbying and advocacy on issues important to their members. They communicate with politicians and use tools like money, gifts, and propaganda to sway decision making. Political parties seek to attain political power by participating in elections. They often support certain ideologies and represent subgroups with differing interests. The major US parties are the Republican Party, considered more socially and economically conservative, and the Democratic Party, considered more socially liberal and economically interventionist.