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The report suggested several factors , including the election of the first black or mixed race president in Barack Obama , concerns regarding future gun control measures , illegal immigration , the economic downturn beginning in 2008 , abortion controversy , and disgruntled military veterans ' possible vulnerability to recruitment efforts by extremist groups as potential risk factors regarding right-wing extremism recruitment .
 Barack Obama
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Barack Obama