Russian and Russia-linked entities paid President Donald Trump's former national security advisor Mike Flynn $55,500 for work that included attending a gala with President Vladimir Putin, according to documents released Thursday.
"And that just wasn't acceptable to me", Cummings said in response.
The oversight committee received the documents earlier this month from Flynn's speaker's bureau, Leading Authorities, after Wall Street Journal makes special mention of how Flynn still retained his top-secret level security clearance at the time, which was after he was terminated from his position as Defense Intelligence Agency head.
Cummings asked the Pentagon to investigate Flynn for this shortly before Trump fired him last month as White House national security adviser for not fully disclosing his discussions with Russia's ambassador to Washington during the transition.
All that's in addition to $530,000 Flynn's security firm collected a year ago to do lobbying work that may have benefited the government of Turkey, all while he was working as an adviser on Trump's presidential campaign.
Flynn, who was receiving classified briefings as part of the campaign, published a controversial op-ed shortly after Trump's election calling for better U.S. -Turkey relations.
Flynn later acknowledged in press interviews the paid engagement to appear at the RT gala to talk about radical Islam, but he also has said he wasn't uncomfortable with it in hindsight, while declining to provide details about any payments from RT.More news: Senate Democrats target Trump's border wall order
Rep. Adam Schiff, D-California, the senior Democrat on the House intelligence committee, said Thursday that Flynn had not been asked to testify at a public hearing the committee will hold on Monday - the first such session since it launched its investigation of Russian meddling.
In a statement, Maryland Rep. Elijah Cummings, the top Democrat on the Oversight Committee, asserted that Flynn's work for the Russian companies is an "apparent violation" of a clause in the Constitution which prohibits USA officials from accepting gifts from foreign governments or entities controlled by foreign governments.
The newly-released files show that RT - designated by the USA intelligence community as a propaganda arm for Russia's government - also paid for luxury hotel stays and other expenses incurred by Flynn and his adult son, Michael Flynn Jr., during the Moscow trip.
"I can not recall any time in our nation's history when the president selected as his national security adviser someone who violated the Constitution by accepting tens of thousands of dollars from an agent of a global adversary that attacked our democracy", Cummings said.
The Oversight committee ranking member added "I also can not recall a time when the president and his top advisers seemed so disinterested in the truth about that individual's work on behalf of foreign nations-whether due to willful ignorance or knowing indifference". The publication reported that Flynn brought his son and stayed at the swank Metropol hotel.
The House Oversight Committee also acquired an email dated November 13, 2015, from an official of RT TV-Russia stating, "We will be covering the payment of General Flynn's fee from our London office".
FARA only requires the disclosure of work - including consulting, lobbying and public relations - done inside the USA on behalf of an individual or entity connected to a foreign sovereign government or government official.