Some signs are pointing to this.
1. Tennessee State apiary registration form lists t.c. as one of the pests that beekeepers can choose from a list of reasons their hive failed.
2. U.S. stopped importing packages from Australia.
3. I've heard scuttlebutt from very credible sources that T.C. is present in the port of Miami Florida.
Also heard the US govt knows about it and is keeping quiet until they officially declare it here.