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While John McCain received 51.6 % of its vote to 47.1 % for Barack Obama , this was a far-closer margin than the 20 points that George W. Bush carried it by in 2004 .
 John McCain, Barack Obama, George W. Bush
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 John McCain, Barack Obama, George W. Bush