I'll disagree with that. There is no Constitutional exception -- and one isn't needed. It isn't that hard to find a tame magistrate to issue a search warrant.
I am wondering if he might have given them permission to enter the house. In which case the question is irrelevent.
I'd change 'question' to 'complaint'.
And I'd need a transcript of what was said before I'd get too concerned. The report has obvious spin in it, so its total credibility is a bit suspect. I don't have any problem with the SS making preliminary investigations of talk that can reasonably be taken to be a threat. I remember an instruction on FR not long ago to the effect of 'don't be stupid'. Sounds like this guy may have violated that rule.
I believe that under the Patriot Act - another one of those Bills that sprung full grown from Congress although no one read it before voting on it - some LEO’s can write their own supoenas.
If the man let the SS into the house they have a right to search?