Re: Could the Borg assimilate The Founders?
When the Borg tried to assimilate Species 8472, they had a hard time doing so because the tissue structure was too dense. I think a Changeling would be able to change their structure on a microscopic level and be dense enough to destroy the nanites. Changelings don't really have cells, or at least that's what we seem to be lead to believe.
That's pretty much exactly what happened in one of the novels.
"I was never a Star Trek fan." J.J. Abrams