The following day, the White House said that Trump had asked the Congress to investigate this issue.
FBI Director James Comey disputed Trump’s allegation and asked the Justice Department to publicly denounce the claim, since such wiretapping order is considered to be illegal without a court's approval.On Tuesday, US media report suggested that the Justice Department requested more time to investigate Trump's allegations against the Obama administration.
"We’re going to get an answer to whether the Trump campaign was surveilled," Graham said of the briefing.
House Intelligence Committee Ranking Member Adam Schiff expressed concerns in a Wednesday press conference that Trump was making such serious accusations against Obama without any basis.
Nunes added that the White House should clarify whether Trump's tweet can be taken literally. The committee chairman stresses that the Trump administration's cooperation on this matter would help the investigation.