WASHINGTON — Hdr22@clintonemail.com. Jeb@jeb.org. No, these are not 2016 campaign accounts. These are the latest, highest-profile examples of private e-mail accounts used by powerful officials to conduct government business. Both political heavyweights just happen to be preparing campaigns for president. Reports this week that Hillary Rodham Clinton relied on her personal account entirely, and did not even have a government e-mail address during her tenure as secretary of state, have triggered a firestorm over the accountability of public officials and the security of valuable information. It turns out Jeb Bush had a personal account, too, while governor of Florida. Both...