RT

The unexplained blackout comes just hours before the competing televised town halls featuring US President Donald Trump and his Democrat challenger Joe Biden, which replaced the debate originally scheduled for October 15 but scrapped due to disagreement over a sudden rule change.

https://www.rt.com/news/503647-twitter-down-user-reports/

Reader comment:

Twitter took down the GOP and Trump twitter feeds…
…Trump and the GOP took down twitter.

I bet a service of process is on the way to inform Dorsey his company use of the national grid has been terminated until the investigation of election meddling is complete.