Authorities were working on Sunday to understand how a gunman armed with an AR-style rifle was able to get close enough to shoot and injure former President Donald Trump at his rally in Pennsylvania on Saturday.
The brazen act of political violence shocked the nation and the world, with foreign leaders condemning the attack with messages of support and wishes for a successful recovery for Trump have poured in from political leaders around the world.
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On a special live edition of @Issue, NBC10 Boston's Sue O'Connell and Cory Smith spoke with retired state trooper and security expert Todd McGhee and Massachusetts Republican Party Chair Amy Carnevale. You can watch the full episode in the video player above.
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