The law you quote is relevant only to electronic intercept of communications to which you are not a party.
Nevertheless, Fitz went on a jihad in the Palme case. That shows he's trying, unethically, to destroy the Bush administration, in the middle of a war for our notional survival, on any basis he can fabricate and expects to be rewarded by becoming Hillary's AG. Nadler's enthusiastic recommendation for him as counsel for any potential impeachment investigation pretty well blows the scam and is strong evidence that there's been some kind of improper and unethical communication between him and the Clinton camp.
After all, the Clintons try to flip anybody they can. Just look at Rush with Markie Post, David Brock with his boy friend, probably introduced to him by the Clintons, and Gary Aldrich's account of an attempted flip in Unlimited Access.
Add to this the fact that destroying the Bush administration, making the WOT unwinable, would make him the Democrat superstar who'd be first on the list to become Hillary's AG. As such, he'd have unaccountable life and death power, just like Reno, provided only that he enabled anything Hillary wanted to do. It's a genuinely terrifying prospect.