Rep. Peter King (R-Seaford), a member of the Intelligence Committee, said he supports Nunes and defended his trip to the White House grounds and conveyance of the information to Trump. He added it would be hard for the public to maintain faith in the investigation if it could not "be objectively investigated or overseen by the chairman".
Federal Bureau of Investigation Director James Comey has said that there is no information to support Trump's allegation that Obama ordered the wiretapping of Trump Tower in NY.
Senate Democrats on the intelligence committee also question where Chairman Nunes got the reports.
The lawmakers say the committee is nearing completion of a review of thousands of documents related to the investigation.
Senators involved in their chamber's separate investigation into the matter have been quick to emphasize the credibility of their investigation, which will hold its first public hearing on Russian election interference efforts on Thursday. Democrats appeared unanimous in urging Nunes to recuse himself, a step he said repeatedly Tuesday he was not considering.
Nunes has faced criticism from Democrats and a few Republicans after revelations that he met with a secret source on White House grounds a day before he claimed that communications of members of President Donald Trump's transition were swept up by USA intelligence as part of incidental collection.
Nunes also drew criticism for briefing the president ahead of his committee and said he would not divulge to his colleagues the sources of his information. It was the Chairman's request she be there.
City Of Seattle Files Lawsuit Against Trump's Executive Order
San Francisco filed a lawsuit earlier this year, also saying the order was unconstitutional. At risk could be millions of federal dollars flowing into the city government.
Sen. Lindsey Graham (R-S.C.) and Sen. Mark Warner of Virginia.
Wyden says it's important for the committee to separate fact from speculation amid reports that several individuals received funds from Russian Federation.
Now! You may remember Yates as not only the woman who refused to defend Trump's first Muslim ban in court and was then immediately fired, but the very same woman who, it came out, had days earlier informed the White House that Michael Flynn, then Trump's national security advisor, was vulnerable to Russian blackmail. He said the department's position was that all actions she took as deputy attorney general were "client confidences" that could not be disclosed without written approval.
Congressional investigators are looking into alleged links between Russians and Trump campaign operatives in the wake of reports that Russian hackers meddled in the election a year ago to work against Democrat Hillary Clinton.
Committee chairman Devin Nunes responded "Why would I?" when asked Tuesday if he should recuse himself.
Trump believes Nunes' assertions prove his prior claims of illegal wiretapping conducted by the Obama administration - claims Nunes himself and FBI Director James Comey have both publicly refuted.