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:

Don't be distracted by Trump & his lunatic rants. We need an independent investigation into #Trumprussia now. https://t.co/tyIErE8GcP — Brendan Boyle (@RepBrendanBoyle) March 4, 2017

Mr. President: If there was a wiretap at Trump Tower, that means a fed judge found probable cause of crime which means you are in deep shit. https://t.co/i7dUMtHXmo — Ted Lieu (@tedlieu) March 4, 2017

POTUS cited no evidence though he has access to intel reports to confirm, it appears to have come from Breitbart: https://t.co/WVFXOYo9K2 https://t.co/TXmGxT2Lrv — Rep. Don Beyer (@RepDonBeyer) March 4, 2017

Trump has been caught in lie after lie. Do not be distracted. Trump's campaign/associates did communicate w/ Russia. What is he hiding? pic.twitter.com/KesTEkL9Te — Maxine Waters (@MaxineWaters) March 4, 2017

Dear @realDonaldTrump,



Turn off the TV & do your job. You're the president of the United States. Start acting like it.



Sincerely,

America https://t.co/Zgfp758DUf — Jim McGovern (@RepMcGovern) March 4, 2017

This means a judge found probable cause that Trump was engaging in criminal activity and issued a warrant for a wire tap https://t.co/cj85vrd7hp — Howard Dean (@GovHowardDean) March 4, 2017

1/ The President can't "order" a wiretap. They are ordered by a judge if there is 1) possible crime, or 2) possible foreign agent involved. — Jim Himes (@jahimes) March 4, 2017