This photo from Tuesday, March 28, 2006 , shows New York Mayor Michael Bloomberg listening as he testifies about gun control before Congress in Washington. Mr. Bloomberg, a Democratic candidate for mayor, is on the defensive about his support of sin taxes on vices like smoking and sugary drinks, which disproportionately impact lower-income Americans. The former mayor says such taxes help encourage Americans to quit or cut back on those vices, and hence promotes their health. (AP Photo/Gerald Herbert, File)
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