While visiting DCA yesterday, June 26, I wanted to ride the Red Car Trolley at around noon. The only trolley on the track was being used for the Newsboy show, so I asked a conductor near TOT when they would resume operation. He said to check back at around 6:00 PM. When I came back, the trolley still wasn't running, and a different conductor said it was closed for the night due to "technical difficulties". This means that the trolleys were closed to guests for the whole day, except for about an hour in the morning.
I found it strange that the trolley was only being used for the Newsboy show for practically the entire day. Let's hope this doesn't become a common occurrence, and that the technical difficulties get resolved.