The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's modern liberal platform is largely considered center-left in the U.S. political spectrum.[5][6][7] It is one of the world's oldest political parties and boasts the lengthiest record of continuous operation in the United States. The party contains the most registered voters of any political organization in the world as of 2004, with 72 million voters.[8][9] Polls taken over the last decade indicate that roughly 35% of American voters self-identify as Democrats.[10]