More than a year after Ivanka Trump blocked Congressman Ted Lieu (D-CA) on Twitter, Lieu is firing warning shots about the legal perils facing Ms. Trump once Democrats assume their majority in the U.S. House in January.

Ms. Trump blocked Lieu - an outspoken critic of President Donald Trump - in August 2017. Lieu has charged that Ms. Trump has no business being a presidential aide and has also called for Ms. Trump's husband, White House advisor Jared Kushner, to have his security clearance revoked.

On Thursday, Lieu renewed his spat with Ms. Trump following reports that Special Counsel Robert Mueller is digging into Ms. Trump's involvement in secret plans to build a Trump property in Moscow during the 2016 presidential race.

"Let me ask White House Senior Advisor @ IvankaTrump about Trump Tower Moscow," wrote Lieu. "Oh wait, she blocked me, a Member of Congress, because my questions bother her. Let me correct that. She blocked me, a Member of Congress who will be in the majority, because my questions bother her."

Twitter has Lieu's back.

On Thursday, Trump's former attorney Michael Cohen pleaded guilty to lying to federal investigators about "Project Moscow," a secret Trump Organization plan to build a 100-story skyscraper in the Russian capital.

Email records show Cohen personally updated Ms. Trump and her brother, Donald Jr., about the project.

Yahoo News reported on Thursday that Mueller is looking into how much the Trump siblings knew about the illicit deal while their father was running for president.

"One of the sources said Ivanka was also involved in Cohen’s efforts," Yahoo found. "And a separate source familiar with the investigation told Yahoo News that Mueller has asked questions about Ivanka and Don Jr.’s work on Trump Tower Moscow."

Ms. Trump was a Trump Organization executive until she joined her father's administration. Junior and his younger brother Eric are still with the family company.

Yahoo said a source close to the Trump Organization confirmed that Ms. Trump and Junior knew of Cohen's backdoor brokering with the Kremlin, but stressed the Trumps "had no knowledge of any work on the project after January 2016." Cohen's Thursday confession calls that into question, bigly.

These latest developments provided additional ammunition for Democratic supporters, who are ecstatic about their party's soon-to-be subpoena power.

Ms. Trump has also been under heightened scrutiny since she was caught using a personal email account for conducting government business.

The president and Ms. Trump have denied any wrongdoing regarding the first daughter's emails.