As fingers point to President Obama's national security adviser Susan Rice as the individual who requested the 'unmasking' of Trumpworld names on raw intelligence reports, Sen. Rand Paul, R-Ky., today demanded that she testify before Congress.

'I believe Susan Rice abused this system and she did it for political purposes,' Paul said today on Morning Joe. 'She needs to be brought in and questioned under oath.'

Bloomberg View columnist Eli Lake wrote that from her position as chief of the National Security Council, Rice asked government agencies to identify names that had been withheld from raw intelligence reports linked with Trump campaign and transition figures.

Monday evening, the Daily Caller News Foundation's Investigative Group piggybacked on this reporting, writing that Rice had asked U.S. spy agencies for 'detailed spreadsheets,' of legal phone calls involving Trump and his aides during the presidential campaign, U.S. Attorney Joseph diGenova told the news site.

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Sen. Rand Paul, R-Ky., appeared on Morning Joe today and demanded that President Obama's national security adviser Susan Rice testify under oath before Congress

Former national security adviser Susan Rice is being blamed for requesting that members of President Trump's teams names were unmasked in intelligence reports

'What was produced by the intelligence community at the request of Ms. Rice were detailed spreadsheets of intercepted phone calls with unmasked Trump associates in perfectly legal conversations with individuals,' diGenova said.

There is not necessarily anything illegal or unusual about a national security adviser seeking to unmask names in raw reports, in order to fully understand the meaning of intercepted conversations.

But in this case those identities – including the name of then-National Security Advisor Mike Flynn – were subsequently leaked and made public.

That is a federal felony.

Paul told the Morning Joe panel that Rice needed to be asked whether President Obama ordered these names unmasked and whether he knew about it.

'This is a big deal,' the Kentucky Republican said. 'If the outgoing administration was actually, literally sifting through things and part of the administration already said we were going to scatter, we were going to get as much information, we were going to scatter it out there publicly to try and harm the Trump administration.'

'This was a witch hunt that began with the Obama administration,' Paul charged. 'Sour grapes on the way out the door.'

'They were going to use the intelligence apparatus to attack Trump and I think they did,' the senator added.

Paul had previously called the allegations against Rice a smoking gun.'

Today he said that 'this is actually, eerily similar to what Trump accused them of which is eavesdropping on conversations for political reasons.'

The Republican senator also excused away Trump's original claims of 'wiretapping,' because 'we don't have wires in our phones anymore ... for the most part we use the term wiretapping to mean eavesdropping.'

Former U.S. National Security Advisor Susan Rice asked intelligence agencies dozens of times to 'unmask' the names of Donald Trump associates that were redacted from raw intelligence reports, it has emerged

Rice, shown in the White House situation room (at left) listening to former president Barack Obama, is now at the center of the firestorm over whether they snooped on Trump during the 2016 election season

President Donald Trump claimed in a series of March 4 tweets that Obama had 'wiretapped' him before the November election; he later clarified that he was talking broadly about secret surveillance

The first drip of information hinting at Rice's involvement came Friday when Fox News reported that the names of several Trumpworld figures were exposed by someone 'very well known, very high up, very senior in the intelligence world.'

WHAT IS UNMASKING? When U.S. intelligence services conduct surveillance of foreign targets, it's possible that American citizens can be swept up in recorded conversations, intercepted emails or other surveillance. That can happen when Americans who are not targets of an investigation are 'incidentally' captured talking to a target. it can also occur when targets merely mention them during a conversation or in a document. When this happens, intelligence analysts routinely delete the Americans' names and replace them with vague identifiers like 'U.S. Person Number One' or 'Person A' – masking their identity from other government officials who may look at reports. Senior intelligence officials can request the 'unmasking' of those names under certain circumstances, but that creates a risk that the names will be leaked. Advertisement

White House Press Secretary Sean Spicer said last week that the Trump administration had uncovered unspecified material 'in the normal course of business,' which was then shared with the House Intelligence Committee's Republican chairman Devin Nunes.

Bloomberg reported that the National Security Council was conducting a review of U.S. policy on how people's identities can be unmasked after their communications are captured incidentally in the course of conducting foreign surveillance.

That routine inquiry apparently uncovered a pattern of Rice's requests.

The names of U.S. citizens who aren't the targets of court-approved snooping are typically replaced with designations such as 'U.S. Person One' or 'Person A' before reports can be circulated to the broad variety of American intelligence agencies.

Ezra Cohen-Watnick, one of the Trump administration intelligence officials who showed Nunes the mysterious materials last week, was conducting the 'unmasking' review.

He brought his concerns about Rice's behavior to the White House counsel's office in February – before President Trump began tweeting claims on March 4 that the Obama administration 'wiretapped' him at his private New York city office.

House Intelligence Committee Chairman Devin Nunes got a sneak peek last week at intelligence reports at the White House which are now believed to be security logs showing how often Rice asked to know which Trump officials were identified 'incidentally' in court-approved foreign snooping

White House Press secretary Sean Spicer said Friday that unspecified documents seen by Nunes were uncovered 'in the normal course of business'

Rice had access to intelligence reports that also contained 'valuable political information on the Trump transition such as whom the Trump team was meeting, the views of Trump associates on foreign policy matters and plans for the incoming administration,' according to Bloomberg.

It's not known whether the president was told, before his now famous tweet storm, what the White House counsel's office had learned.

But Trump told Financial Times on Saturday that his tweets are 'turning out to be true.'

Rice insisted last month that she was in the dark about any efforts to identify Trump-linked private individuals in intelligence reports, after Nunes publicly referred to 'unmasking.'

'I know nothing about this,' she told PBS. 'I was surprised to see reports from Chairman Nunes on that account today.'

Trump hasn't stopped tweeting about reports that support his March claims that he was surveilled for political purposes

'The real story turns out to be SURVEILLANCE and LEAKING! Find the leakers,' Trump tweeted on Sunday.

He continued to cite the Fox News Channel on Monday, writing on Twitter that the network reported 'from multiple sources: "There was electronic surveillance of Trump, and people close to Trump. This is unprecedented".'