President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE knocked NBC and MSNBC for a microphone glitch during the first Democratic primary debate in a series of tweets late Wednesday and early Thursday.

".@NBCNews and @MSNBC should be ashamed of themselves for having such a horrible technical breakdown in the middle of the debate," he tweeted during debates. "Truly unprofessional and only worthy of a FAKE NEWS Organization, which they are!"

.@NBCNews and @MSNBC should be ashamed of themselves for having such a horrible technical breakdown in the middle of the debate. Truly unprofessional and only worthy of a FAKE NEWS Organization, which they are! — Donald J. Trump (@realDonaldTrump) June 27, 2019

Trump followed that up with an edited video of the debate in which the lights are turned off, the president appears and then a slogan for Trump/Pence 2020 emerges.

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A technical glitch in the debate broadcast left some NBC moderators' microphones on while they were backstage.

The issue was quickly fixed, and the debate continued.