Democratic lawmakers on Saturday lined up to slam President Trump for accusing President Obama of having Trump Tower's "wires tapped" before Election Day without offering evidence.

“Terrible! Just found out that Obama had my ‘wires tapped’ in Trump Tower just before the victory. Nothing found. This is McCarthyism!” Trump wrote.

“Is it legal for a sitting President to be 'wire tapping' a race for president prior to an election? Turned down by court earlier. A NEW LOW!” he added in subsequent tweets. “I'd bet a good lawyer could make a great case out of the fact that President Obama was tapping my phones in October, just prior to Election!”

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It was not immediately clear whether Trump had any proof or was referencing a report. Breitbart News on Friday reported on conservative radio host Mark Levin’s claim that Obama executed a “silent coup” of Trump via “police state” tactics. White House chief strategist Stephen Bannon was the executive chair of Breitbart before joining Trump’s team.

Democrats hit back over social media: