Senator Rand Paul (R-KY) on Tuesday, doubled down on his claim that former National Security Adviser Susan Rice’s repeated attempts to unmask Trump officials is a “smoking gun.”

But he also went a step further in his condemnation of Rice.

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

When “Morning Joe” co-host Mika Brzezinski asserted that he doesn’t know for certain that’s what occurred, Paul quickly shot back:

“Bring her in and ask her under oath. Ask her whether President Obama ordered this or whether he knew about it. That is a big deal.”

Susan Rice, a former top adviser to President Barack Obama, found herself in the headlines once again after reports surfaced showing she made “dozens” of requests to unmask Trump officials who were subject to incidental electronic surveillance.

Getty Images/Chip Somodevilla

Sources told Fox News:

The unmasked names, of people associated with Donald Trump, were then sent to all those at the National Security Council, some at the Defense Department, then-Director of National Intelligence James Clapper and then-CIA Director John Brennan – essentially, the officials at the top, including former Rice deputy Ben Rhodes.

The names were part of incidental electronic surveillance of candidate and President-elect Trump and people close to him, including family members, for up to a year before he took office.

President Trump has only added fuel to the fire by suggesting his campaign was “spied on” before he won the GOP nomination:

Trump also personally accused President Obama of having the “wires tapped” at Trump Tower. Sen. Paul argued during the MSNBC interview that the latest revelations show Trump was using the term to describe electronic surveillance.