Role of Political Parties and Elections in USA

Parties are still relevant and important, but they are not as powerful as they once were.
Political parties in their roles divide in two groups:
Responsible parties. Their role is to advocate for certain public policies and to bring together groups and individuals interested in those policies. This role also assumes parties use an ideology or a set of principles to screen new members and to reward and sanction existing members so that everyone conforms to the same strategies and objectives.
The Democratic Party is characterized as responsible for ensuring a m…