It was the abrupt cancellation of those officials' scheduled March 28 appearance that set off a chain of events that sent the House investigation into a tailspin and led to the recusal of the committee's chairman, Rep. Devin Nunes, R-Calif., a member of Trump's transition team, from involvement in the probe.
The latter hearing was the most contentious for Republicans and Democrats on the committee.
The Committee submitted a letter Thursday asking FBI Director James Comey and National Security Agency Director Admiral Mike Rogers to testify in closed session on May 2.
But partisan differences persist: Democrats want to focus on the finding of USA intelligence agencies that Russian Federation meddled in the election to help Donald Trump win, while some Republicans agree with Trump that the real issue is whether Obama's administration spied on Trump's campaign and leaked what they found.
It also asked several senior national security figures in the previous administration to appear for an open hearing after May 2: former CIA director John Brennan, former director of national intelligence James Clapper and ex-deputy attorney general Sally Yates. There was also no evidence that Nunes had attempted to reschedule the meeting with the former Obama administration officials.
Nunes remains the committee's chairman. A planned closed hearing with Comey and Rogers, who had testified publicly on March 20, also was put off.
Comey already delivered explosive public testimony to the House committee in March, when he confirmed that the Federal Bureau of Investigation is investigating whether there was collaboration between Trump's associates and Russian Federation during the presidential campaign.
Now that President Donald Trump has again refused to release his tax returns, it is time to try something new.
The panel's chairman had focused largely on looking into whether Trump transition members caught up in US surveillance of other targets were "unmasked", or had their identities revealed.
The FBI is conducting a counterintelligence investigation exploring how Russian Federation covertly sought to influence the American presidential election on Trump's behalf.
The Senate Intelligence Committee is saying it is investigating the Russian influence on our election. It developed a plan to swing the election in favor of President Trump and undermine voters' faith in the election process, the report said.
Both Republicans and Democrats who later saw the documents indicated that there was nothing illegal or exceptional in how the Obama administration had dealt with the identities of the Trump figures mentioned in them.