Liberalism is a political ideology typically associated with the Democratic party of the USA. They are on the Left side of the political spectrum and typically believe in equal rights and treatment for all people (including women, members of the LGBT community and those of all races and ethnicities). Economically Liberals favor an approach that lowers income inequality and helps to ensure all people have enough to live on and one main liberal cause is raising the minimum wage. The separation of church and state to ensure a society where people can be free to practice any religion or no religion if they choose so is also typically seen as a liberal idea.
The main Liberal forces in America today are: President Barack Obama, Senator Elizabeth Warren, Senator Bernie Sanders and former First Lady, Senator and Secretary of state Hillary Rodham Clinton who many expect to be the Democratic candidate for president in 2016.