Indianapolis

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Former Pennsylvania Sen. Rick Santorum speaks during the leadership forum at the National Rifle Association's annual convention Friday, April 25, 2014, in Indianapolis. Several potential Republican contenders for president were courting gun-rights supporters at the convention Friday. (AP Photo/AJ Mast)

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Louisiana Gov. Bobby Jindal speaks during the leadership forum at the National Rifle Association's annual convention Friday, April 25, 2014, in Indianapolis. (AP Photo/AJ Mast)

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Indianapolis Colts kicker Adam Vinatieri speaks during the leadership forum at the National Rifle Association's annual convention in Friday, April 25, 2014 in Indianapolis. (AP Photo/AJ Mast)

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** FILE ** Gov. Mike Pence waves after speaking at the leadership forum at the National Rifle Association's annual convention in Friday, April 25, 2014, in Indianapolis. (AP Photo/AJ Mast)

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The Indiana State Fair Coliseum reopens after a historic $63 million renovation Thursday, April 24, 2014, at the Indiana State Fair grounds in Indianapolis. (AP Photo/The Indianapolis Star, Matt Kryger)

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Indiana State Fairgrounds executive director Cindy Hoye addresses the crowd Thursday, April 24, 2014, before the Indiana State Fair Coliseum reopens after a historic $63 million renovation at the Indiana State Fair grounds in Indianapolis. (AP Photo/The Indianapolis Star, Matt Kryger)