During the presidential election, Republican lawmakers made an endless stink about the fact that former secretary of state Hillary Clinton used a private e-mail server to conduct official business. The F.B.I. eventually launched an investigation into the matter, which it reopened not even two weeks before Election Day—a move that many have said was a factor in Clinton’s defeat. Few were more vocal about Clinton’s e-mail use and its disqualifying nature than now-President Donald Trump; to this day, when Trump speaks of Clinton at rallies, his crowd chants, “Lock her up”—a sort of rallying cry condemning her e-mail crimes. So when Politico reported that Ivanka Trump and Jared Kushner, the president’s daughter and son-in-law and senior advisers in the West Wing, set up a private server of their own in December and used it to communicate with White House colleagues and others about official business, Democrats didn’t take it lightly.

Now, Rep. Elijah Cummings, a ranking member of the House Committee on Oversight and Government Reform, is asking the F.B.I. to look into Jivanka’s e-mail use. In a letter to F.B.I. Director Christopher Wray, Cummings asked him to “conduct a security review to determine whether any classified or sensitive information was transmitted or stored on private e-mail accounts or nongovernmental servers by . . . Jared Kushner and Ivanka Trump . . . to determine whether any of these nongovernmental systems or private devices were vulnerable to attack by cyber criminals.”

Cummings seemed to be giving the Trumps a taste of their own medicine when he noted that “the F.B.I. has conducted counterintelligence investigations in the past to examine the use of private family domains and nongovernmental servers for official government business—most notably the review of former Secretary of State Hillary Clinton’s e-mail. I ask that the F.B.I. conduct a similar review in this instance.”

Initially, Kushner’s attorney Abbe Lowell said his client sent “fewer than 100 e-mails from January through August” from his personal account, and that he’d forwarded such messages to his official White House e-mail in order to comply with the Presidential Records Act, which stipulates that documents about White House activities be preserved. But Cummings is also concerned with a third e-mail address on Ivanka and Jared’s personal domain, ijkfamily.com, which Kushner reportedly set up as he prepared to take on a White House role, and which routed “hundreds” of e-mails discussing travel documents, schedules, and some official White House materials. (A representative for the family said that Ivanka is careful about keeping her work and personal lives separate, and the White House has said it is reviewing the use of personal e-mail by administration officials in response to these reports.)

At the end of last month, Cummings and Republican Congressman Trey Gowdy sent a letter seeking information about the couple’s use of personal e-mail accounts and asked that their e-mails not be destroyed, modified, or transferred. On Tuesday, however, USA Today reported that following Politico’s initial story, Ivanka and Jared’s personal accounts were moved to a server run by the Trump Organization. (A spokesman for the couple said in a statement that their personal e-mail “does not reside and never has resided in, nor passed through, the Trump Organization e-mail server.”)

Cummings noted this in his letter, saying, “If these reports are accurate, they raise serious questions about the security of the private family domain, who may have had access to or attempted to gain access to the systems, and whether any classified or sensitive government information was transmitted.”