Two prominent Democratic members of Congress are calling for Ivanka Trump's security clearance to be revoked, insisting she has "severe credibility issues." President Donald Trump's 35-year-old daughter is possibly the president's most trusted adviser in the White House.

In a letter Thursday to White House Counsel Don McGahn, California Rep. Ted Lieu and Virginia Rep. Don Beyer referred to recent press reports that Ivanka Trump "used at least two, and possibly three, private email accounts for official White House business. Under scrutiny from investigators, Ms. Trump and her husband Jared Kushner then re-routed their email accounts to Trump Organization computers in an apparent attempt to hide their emails."

During the 2016 presidential campaign, Donald Trump focused on his Democratic opponent Hillary Clinton's use of a private email server while she was U.S. secretary of state, provoking his supporters to chant "Lock her up!" at raucous campaign rallies. Clinton's email practices may have put classified information at risk.

Lieu and Beyer's letter adds that Ivanka Trump and Kushner, who's also a White House adviser to the president, have been fined for missing financial-disclosure deadlines.

"Most concerning," the congressmen write, "Mr. Kushner and Ms. Trump's financial disclosures contained significant discrepancies between their joint assets -- some values listed are hundreds of thousands of dollars apart. Notably, the OGE 278-T form's instructions explicitly state that any knowing and willful falsification of information required may subject the reporting party to criminal prosecution."

Ivanka Trump and Kushner -- both, like the president, novices in government -- have increasingly faced scrutiny from the press and President Trump's political opponents. On Wednesday, Washington Post conservative columnist Jennifer Rubin said they should resign their White House posts. "The continued presence of Jared Kushner and Ivanka Trump in the West Wing constitutes both a legal liability and a political embarrassment for President Trump," she wrote.

On Wednesday, the investigative news site ProPublica called into question how Ivanka and her brother Donald Trump Jr. avoided federal indictment in 2012 after allegedly misleading prospective Trump SoHo buyers.

Over the summer congressional Democrats unsuccessfully demanded Kushner's security clearance be withdrawn after reports surfaced about meetings he'd had with Russian officials and his role in the firing of former FBI Director James Comey.

Lieu and Beyer have been among President Trump's most determined critics, with Lieu, a U.S. Air Force veteran, frequently penning "Dear @realDonaldTrump" tweets that call into question the president's character and motives.

On Wednesday Lieu tweeted a link to a news story about Ivanka Trump's support for computer-science education in kindergarten. "Perhaps Ivanka can teach kids how to re-route their emails so that they won't be discovered," he jabbed.

Ivanka Trump, who has said she still gets "goosebumps" when walking through the White House, admitted in September that she has not been a moderating voice in her father's ear, as some Trump watchers had hoped.

"Some people have created unrealistic expectations of what they expect from me," she told the Financial Times. "That my presence, in and of itself, would carry so much weight with my father that he would abandon his core values and the agenda that the American people voted for when they elected him. It's not going to happen. To those critics, shy of turning my father into a liberal, I'd be a failure to them."

-- Douglas Perry