Photo: Defense Intelligence Agency

Michael Flynn, fired from his post as President Trump's national security advisor for his breach of the Logan Act, is in more hot water after reports have emerged suggesting that he lied on his security clearance application.

In applying for renewal of his security clearance, Flynn allegedly said his paid speech at a 2015 gala in Moscow, which was broadcast on a Russian TV network, was "funded by U.S.companies," according to a Democratic lawmaker.

The lawmaker publicized the allegation Monday and cited an investigation on the part of the Defense Department.

The senior Democrat for the House Oversight and Government Reform Committee, Elijah Cummings, explained that the panel has "documents that appear to indicate that General Flynn lied to the investigators who interviewed him in 2016 as part of his security clearance renewal."

Cummings made the statement in a letter to Republican representative Jason Chaffetz, chair of the Oversight and Government Reform Committee.According to Senate Intelligence Commitee chair Richard Burr and senior Democrat, Mark Warner, Flynn refused a Senate Intelligence Committee interview on Monday and declined to provide the documents demanded by the committee via subpoena.

The documents and Flynn's testimony were demanded by the subpoena because they are relevant to the committee's probe into connections between the Trump presidential campaign and Russian interference in the election.