Answer:
The Democratic Party and the Republican Party
Explanation:
These two parties are the biggest and the way they impact American politics is by one believing in lower taxes, free market capitalism, deregulation of corporations, and restrictions on labor unions, which is Republicans and one believing egalitarianism, social equality, protecting the environment, and strengthening the social safety net through liberalism. They support voting rights and minority rights, including LGBT rights, multiculturalism, and religious secularism..