Washington: US President Donald Trump says if a foreign power were offering dirt on his 2020 opponent, he'd be open to accepting it and would have no obligation to call in the FBI.

US President Donald Trump. Credit:AP

Speaking to ABC News, Trump says, "I think I'd want to hear it." He adds, "There's nothing wrong with listening."

Trump's eldest son's role in organising a 2016 meeting with a Russian lawyer offering negative information on Hillary Clinton was a focus of special counsel Robert Mueller's probe. FBI Director Christopher Wray told lawmakers that Donald Trump jnr should have called his agency to report the offer.

Donald Trump jnr was questioned by a US Senate committee on Wednesday in a closed session about a June 2016 meeting at Trump Tower in New York in which a Russian lawyer had offered damaging information on Hillary Clinton, the elder Trump's Democratic opponent in the 2016 presidential election.