The US House of Representatives Intelligence Committee has invited former Acting Attorney General Sally Yates to testify as it restarts its investigation into alleged Russian meddling in the 2016 US election.
After stalling over the committee chairman's ties to Donald Trump's White House and disagreements over who should testify, the bipartisan committee has sent two letters inviting a number of FBI, NSA and Obama administration officials, including Yates, to appear behind closed doors on May 2.
The planned hearings are the first the committee has announced since its chairman, Republican Representative Devin Nunes, recused himself from the Russia investigation on April 6 after receiving information at the White House about surveillance that swept up some information about members of Trump's transition team.
Echoing Trump, Nunes suggested that Obama's administration had handled that information incorrectly.
Nunes remains the committee's chairman.
FBI director James Comey and NSA director Michael Rogers testified in a public hearing on March 20. At that hearing, Comey confirmed for the first time that the FBI was investigating possible ties between Trump's presidential campaign and Russia as Moscow sought to influence the election.
Nunes was a supporter of Trump's campaign and a member of his transition team. His decision two days after the public hearing to hold a press conference about the information and discuss it with Trump before disclosing it to Democrats raised questions about whether he could lead a credible investigation.
Committee Democrats also were angered when Nunes scrapped a scheduled public hearing with Yates. A planned closed hearing with Comey and Rogers also was put off.
The controversial orders Donald Trump has already issued
The controversial orders Donald Trump has already issued
1/9 Trump and the media
White House Press Secretary Sean Spicer takes questions during the daily press briefing
2/9 Trump and the Trans-Pacific Partnership
Union leaders applaud US President Donald Trump for signing an executive order withdrawing the US from the Trans-Pacific Partnership negotiations during a meeting in the Roosevelt Room of the White House in Washington DC. Mr Trump issued a presidential memorandum in January announcing that the US would withdraw from the trade deal
3/9 Trump and the Mexico wall
A US Border Patrol vehicle sits waiting for illegal immigrants at a fence opening near the US-Mexico border near McAllen, Texas. The number of incoming immigrants has surged ahead of the upcoming Presidential inauguration of Donald Trump, who has pledged to build a wall along the US-Mexico border. A signature campaign promise, Mr Trump outlined his intention to build a border wall on the US-Mexico border days after taking office
4/9 Trump and abortion
US President Donald Trump signs an executive order as Chief of Staff Reince Priebus looks on in the Oval Office of the White House. Mr Trump reinstated a ban on American financial aide being granted to non-governmental organizations that provide abortion counseling, provide abortion referrals, or advocate for abortion access outside of the United States
5/9 Trump and the Dakota Access pipeline
Opponents of the Keystone XL and Dakota Access pipelines hold a rally as they protest US President Donald Trump's executive orders advancing their construction, at Columbus Circle in New York. US President Donald Trump signed executive orders reviving the construction of two controversial oil pipelines, but said the projects would be subject to renegotiation
6/9 Trump and 'Obamacare'
Nancy Pelosi who is the minority leader of the House of Representatives speaks beside House Democrats at an event to protect the Affordable Care Act in Los Angeles, California. US President Donald Trump's effort to make good on his campaign promise to repeal and replace the healthcare law failed when Republicans failed to get enough votes. Mr Trump has promised to revisit the matter
7/9 Donald Trump and 'sanctuary cities'
US President Donald Trump signed an executive order in January threatening to pull funding for so-called "sanctuary cities" if they do not comply with federal immigration law
8/9 Trump and the travel ban
US President Donald Trump has attempted twice to restrict travel into the United States from several predominantly Muslim countries. The first attempt, in February, was met with swift opposition from protesters who flocked to airports around the country. That travel ban was later blocked by the Ninth Circuit Court of Appeals. The second ban was blocked by a federal judge a day before it was scheduled to be implemented in mid-March
SANDY HUFFAKER/AFP/Getty Images
9/9 Trump and climate change
US President Donald Trump sought to dismantle several of his predecessor's actions on climate change in March. His order instructed the Environmental Protection Agency to reevaluate the Clean Power Plan, which would cap power plant emissions
The House panel is examining whether Russia tried to influence the election in Trump's favour, mostly by hacking Democratic operatives' emails and releasing embarrassing information, or possibly by colluding with Trump associates.
Russia denies the allegations, which Trump also dismisses.
The Senate Intelligence Committee is conducting a separate, similar investigation.
Senate investigators currently are interviewing analysts and intelligence agents who prepared public and classified reports in January that concluded that Russia had interfered in last year's election on Trump's behalf, an official familiar with the congressional activity said.
At this point they are a long way from scheduling interviews or hearings with any principal witnesses from either the Obama or Trump administrations, the official said.