We don't even *have* a Fourth Amendment. What they routinely do here is therefore even worse, and they don't even really have to lie about it.
Neither do we, in Italy. But, it's also just a bit worse. Last Dec 24th a DPDM (Prime Minister's Decree, if u pass me the inaccurate translation) stated that any digital info in any db of any company (ISP included) must be disclosed to investigating authorities if such authorities think accessing them *could* be useful for matters of National Interest. So, not only we don't have a Fourth Amendment, but now its opposite legal principle is a law (approved bypassing Parliament).
So, Secret Services here can just "tap any digital wire" as they please.
Interestingly, this thing had NO media coverage at all.