To the best of my knowledge, the use of Delta Force units are never discussed and certainly members of a deployed or about to be deployed unit do not call family members.
Moreover, there are severe restrictions on what federal military troops can do in a US civilian environment vs what state military troops are permitted to do.
Trust...but verify.
This is an unsubstantiated and most probably false rumor.
Yeah, I give it a 98% probability that this is a hoax. Delta soldiers would not discuss any of their current missions with family members, and they are not needed for riot control. There's a very slight chance that they are going in to rescue some federal or state emergency workers who are trapped and taking small arms fire.