I think what we can say is there has been no investigation by the CDC or other government health agency to determine just why we have this sudden outbreak in 46 states of a virus rarely seen in the US since it first appeared in 1962.
Have any of the illegal children entrants from Central America been tested for this virus? Were they screened at the border? Are you aware of any investigative work being done to determine why this outbreak has occurred?
While there have been smaller outbreaks in the psat (here and abroad), enterovirus D-68 is rarely seen anywhere.