The House and Senate intelligence committees have asked President Donald Trump's personal attorney, Michael Cohen, to provide information about his contacts with Russian officials as part of their probes into Russia's election interference and whether any of Trump's associates colluded with Moscow.

Cohen told ABC on Tuesday that he "declined the invitation to participate, as the request was poorly phrased, overly broad, and not capable of being answered." He later told CNN that the lawmakers "have yet to produce one single piece of credible evidence that would corroborate the Russia narrative."

Cohen did not respond to a request for additional comment from Business Insider.

One week ago, Michael Flynn, the former national security adviser, said through his attorney that he would invoke his Fifth Amendment right and decline a subpoena issued by the Senate for documents related to his interactions with Russian officials from June 2015 to January 2017. Carter Page, an early foreign-policy adviser to Trump's campaign, has also declined to provide the Senate Intelligence Committee with similar documents.

The Senate Intelligence Committee voted last week to give its chairman, Richard Burr, and ranking member, Mark Warner, blanket authority to issue subpoenas where they deemed necessary. It is unclear whether the committee plans to subpoena Cohen, and Page told Business Insider last week that he had not yet been subpoenaed.

A representative for Burr declined to comment, and one for Warner did not respond to a request for comment.

The House Intelligence Committee, meanwhile, has not yet issued subpoenas, a committee aide told Business Insider on Tuesday. The aide pushed back against an AP report published earlier on Tuesday that said the committee had already subpoenaed Cohen.

Cohen was at the center of a bombshell New York Times report published earlier this year that said he hand-delivered a "peace plan for Ukraine and Russia" to Flynn before Flynn was asked to resign in February.

The plan — originally drafted by the Ukrainian lawmaker Andrii Artemenko — outlined lifting sanctions on Russia in return for Moscow withdrawing its support for pro-Russia separatists in eastern Ukraine, according to the report. It would also allow Russia to maintain control over Crimea, the peninsula it annexed in 2014.

Cohen has denied delivering the plan to Flynn, but Artemenko told Business Insider earlier this year that he "got confirmation" that Cohen brought the document to the White House.

Cohen was also named as a middleman for Trump and Russia in the dossier compiled by former British spy Christopher Steele. The dossier, which contained many unverified claims but which investigators have used as a "roadmap" in their probe, alleged that the Trump campaign and Moscow conspired to undermine Hillary Clinton, the Democratic nominee, during the election.

In January, Cohen told ABC the allegations in the dossier were "laughably false." The dossier says Cohen met with Russian officials in Prague last August, but Cohen said he was in California visiting colleges with his son.

The Senate Intelligence Committee has also asked Paul Manafort, Trump's former campaign chairman, and Roger Stone, a longtime Trump confidant, for information about their contacts with Russians during the election. Both have agreed to be interviewed by the committee.