Former President Donald Trump has vowed to unleash federal prosecutors on critics if he wins reelection next year in what he frames as retaliation for his own criminal woes. The once-and-maybe-future president openly admitted that he would order authorities to prosecute his rivals, a move that would amount to a dramatic break with a bedrock principle of the American legal system. “If I happen to be president and I see somebody who’s doing well and beating me very badly, I say: ‘Go down and indict them,'” Trump told the Spanish-language Univision network in an interview aired Thursday night. “T...