Technical difficulties mar 2nd hour of debate

MIAMI — The second hour of the first Democratic presidential debate has been derailed by technical difficulties.

As debate moderators Rachel Maddow and Chuck Todd took over Wednesday for the next round of the debate, the 10 candidates on stage were unable to hear the question Todd was trying to ask about the federal government's role in getting guns off the street.

Following back-and-forth confusion, Todd announced the debate would head to a commercial break.

It wasn't immediately clear what happened.

President Donald Trump tweeted that debate hosts NBC and MSNBC "should be ashamed of themselves for having such a horrible technical breakdown in the middle of the debate."

Trump is en route to Japan for the Group of 20 summit.