Trump mocked NBC network for an embarrassing technical problem at the first Democratic presidential debate on Wednesday night.

As 10 Democratic presidential candidates debated on Wednesday, June 26, for the first time in Miami, there was a technical issue with a microphone, it was still on when it should have been switched off and some of the candidates could not hear and the moderator had to switch to unplanned commercial break.

On his way to Japan to participate in G-20 summit, President Trump mocked the incident, tweeting:

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

2020 presidential candidate Andrew Yang also made fun out of the liberal news outlet.

“Oh no- technical difficulties. It’s the Russians,” Yang tweeted.

The first Democratic primary debate focused on economic goals, health care system, the environment, immigration crisis.

Earlier, the president made a refueling stop in Alaska and visited U.S. troops at Joint Base Elmendorf-Richardson, on his way to Japan. When asked how he expected the debate go, the president said, “I think they all are going to do very poorly.”

“Boring” was the first reaction from President Trump over the first Democratic primary debate.

There are 20 candidates for 2020 Democratic presidential debate, 10 went on stage on Wednesday, the other 10 will join the second part of the debate that will air on June 27, featuring the frontrunners of the Democratic primary: former vice president Joe Biden and Sen. Bernie Sanders.