According to a short biography in ''Notable Men of Tennessee'':<ref name=bio/>
According to a short biography in ''Notable Men of Tennessee'':<ref name=bio/>
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{{cquote|Though a bold and outspoken Republican, [Butler] is popular with both parties, and can always secure the passage of all measures affecting his constituents. Perhaps no member of that body is so blunt and candid in criticism of the Democratic Party, yet all like him personally.|||''Notable Men of Tennessee: From 1833 to 1875; Their Times and Their Contemporaries'', p. 77–78}}
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{{cquote|It is not surprising that Judge Butler is thus constantly returned to the Legislature, for he is an able and faithful member. Though a bold and outspoken Republican, [Butler] is popular with both parties, and can always secure the passage of all measures affecting his constituents. Perhaps no member of that body is so blunt and candid in criticism of the Democratic Party, yet all like him personally.|||''Notable Men of Tennessee: From 1833 to 1875; Their Times and Their Contemporaries'', p. 77–78}}