Also worth pointing out that if his staff (house.gov) sent him an email (house.gov) and they all presumably use the same mail server (they do, House IT is all in house), then the tubes he's referring to were literal wires going from the basement of the capitol building into his office. I suspect it'd be pretty hard for the "commercial" stuff to get caught up in that.

Sounds like House IT was bad at administering a mailserver (they are -- when I was at the Sunlight Foundation, we linked to them and they called us accusing us of a DDoS), and decided to blame it on "the commercial internet."