The letter calls for "Cyber Threat Information Sharing Legislation" without specifying _which_ bill. But given that CISA is the only such bill in front of Congress, it looks like Apple has endorsed the bill (without technically endorsing it). Given the specifity of the other bills the letter mentioned, and how publicly unpopular CISA is, this seems like a massively spineless move.

If Apple is serious about privacy they should clarify and affirmatively oppose CISA.