Democratic presidential hopeful Sen. Kamala Harris (D-Calif.) vowed sweeping executive action on gun control if she is elected president, detailing her proposals for gun safety to a CNN town hall audience Monday night. Asked about her plan for addressing gun violence and school shootings in particular, Harris vowed that if Congress fails to get their act together and pass meaningful gun control legislation in the first 100 days of her presidency, she will sign an executive order requiring any retailer selling more than five guns a year to conduct background checks.Harris has also proposed revoking the licenses of gun manufacturers...