As election officials across the country brace for the possibility of federal agents descending on polling sites in November, a nationwide coalition of Democratic district attorneys has vowed to prosecute any federal agent suspected of intimidating voters. The announcement, first reported by Politico, comes shortly after President Donald Trump refused to rule out sending U.S. Immigration and Customs Enforcement officers to election sites during the midterms. “I’d do anything necessary to make sure we have honest elections,” Trump told reporters earlier this month. The coalition includes prosecutors from Philadelphia, Minneapolis, Dallas and Northern Virginia, among other jurisdictions. “We’re ready to...