In his opening monologue tonight, Sean Hannity said we must get to the bottom of President Trump's accusation that former President Obama ordered Trump Tower be wiretapped during the presidential election.

Hannity said Trump's claim isn't merely a conspiracy theory or paranoia because a "disturbing pattern" is emerging.

He argued that a "shadow government" of career government bureaucrats is secretly trying to derail the Trump administration.

"Many of these are people that are President Obama holdovers," Hannity said. "There are ... people in the intelligence community purposely leaking information to try and damage and destroy President Trump and the advisers, of course, that surround him."

He pointed out that former National Security Adviser Michael Flynn was forced to resign after information about his conversations with the Russian ambassador were leaked to the press.

As for the wiretapping of Trump Tower, Hannity said we must get the answer to one question: What did then-President Obama know and when did he know it?

"To me, what happened to retired Lt. Gen. Flynn and what we are now seeing with all these other intelligence leaks, this is a canary in a coalmine," Hannity said. "This accusation that President Trump made is serious. We need to get to the bottom of what the truth is, and where all of this came from, and who knew what, when and where."

Watch more above.

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