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It dominated American politics during the Second Party System , from 1832 to the mid-1850s , with such leaders as presidents Andrew Jackson , Martin Van Buren , James K. Polk , and Senator Stephen Douglas , who usually bested the opposition Whig Party by narrow margins , as both parties worked hard to build grass-roots organizations and maximize the turnout of voters .
 Andrew Jackson, Martin Van Buren, James K. Polk, Stephen Douglas, Whig 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:
 Andrew Jackson, Martin Van Buren, James K. Polk, Stephen Douglas, Whig Party