Roger Stone, a longtime ally of President Donald Trump, said on Sunday he has offered to testify before a congressional committee investigating possible Russian meddling in the 2016 presidential election and ties to the Trump campaign.

Stone, an informal adviser to Trump, told ABC's "This Week" he had not received a reply from the House of Representatives intelligence committee on his offer of public testimony.

Along with former Trump campaign manager Paul Manafort, who has also offered to testify, Stone was among the Trump associates whose communications and financial transactions were being examined by the FBI and others as part of a larger investigation into possible links with Russian officials, according to a Jan. 20 report in the New York Times.