A lawyer representing former White House chief of staff Reince Priebus said a team of US government investigators interviewed Priebus on Friday as part of an ongoing probe on whether the Trump campaign colluded with Russia
during last year's US presidential election.
"He was happy to answer all of their questions," said Priebus' lawyer, William Burck.
Priebus was head of the Republican National Committee during Trump's presidential campaign and served as the president's chief of staff when Trump took office, before he resigned in July.
Special counsel Robert Mueller and his team of investigators are also looking into some of the actions the US President has taken since assuming office in January, including the firing of FBI Director James Comey. Among other things, Mueller's
team is trying to see whether the president might have obstructed justice earlier this year by persuading Comey to drop an investigation on then-National Security Advisor Michael Flynn.
Flynn resigned in February following reports he had met with the Russian ambassador .
Investigators expect to speak to a number of current and former officials in the coming weeks.
President Trump has not been accused of any wrongdoing.