Sen. Richard Blumenthal (D-Conn.) called for an investigation into Commerce Secretary Wilbur Ross Wilbur Louis RossTikTok, WeChat to be banned Sunday from US app stores The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill Judge orders Trump administration stop 'winding down' census collection, processing efforts MORE after it was revealed that Ross had failed to disclose shared business interests with members of Russia President Vladimir Putin’s family.

“Why do so many Trump associates have such trouble disclosing relationships with Russia?” Blumenthal tweeted Sunday about the new report.

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“In concealing an ongoing financial relationship w/ Russian oligarchs, Sec. Ross misled me, Senate Commerce Committee & the American people,” he tweeted. “Inexcusable and intolerable. Americans are owed answers on this Cabinet's troubling failure to disclose links to Russian interests.”

“With Wilbur Ross revelations, question must be asked - whose interests come first in this Administration? Only after a thorough investigation can Americans be sure Secretary Ross really has their best interests at heart.”

Why do so many Trump associates have such trouble disclosing relationships with Russia? https://t.co/VUChe0vcFt — Richard Blumenthal (@SenBlumenthal) November 5, 2017

In concealing an ongoing financial relationship w/ Russian oligarchs, Sec. Ross misled me, Senate Commerce Committee & the American people. — Richard Blumenthal (@SenBlumenthal) November 5, 2017

Inexcusable and intolerable. Americans are owed answers on this Cabinet's troubling failure to disclose links to Russian interests. — Richard Blumenthal (@SenBlumenthal) November 5, 2017

With Wilbur Ross revelations, question must be asked - whose interests come first in this Administration? — Richard Blumenthal (@SenBlumenthal) November 5, 2017

Only after a thorough investigation can Americans be sure Secretary Ross really has their best interests at heart. — Richard Blumenthal (@SenBlumenthal) November 5, 2017

Blumenthal called for the investigation just hours after documents, first obtained by German newspaper Süddeutsche Zeitung and released by the International Consortium of Investigative Journalists as part of the "Paradise Papers" leaks, revealed Ross’s business ties to Putin’s family.

Ross maintains an interest in Navigator Holdings, which his investment company partially owned. People close to Putin, including his son-in-law, run a Russian energy firm linked to Navigator, the documents revealed.

Ross had initially promised to cut ties with more than 80 financial entities that he had interests in.

A Commerce Department spokesperson told NBC News that Ross has recused himself from transoceanic shipping matters and is in touch with ethics officials.

The new revelations comes less than a week after the first indictments were handed down in special counsel Robert Mueller’s probe into Russian election interference.