21793
Although the current two-party system in the U.S. , with the Republican party and Democratic party , started in 1856 , many of the older parties still existed and had an influence .
 Republican party, Democratic party
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Republican party, Democratic party