Companies like Apple count on the support of the US Government in all sorts of trade / legal / international issues, now and in the future. Using Apple as an example, when you're a half trillion dollar company and trying to navigate practically every market on earth, it's an absolute nightmare at times and helps to have a superpower that possesses the world's largest economy and military in your corner. Having IP problems in Indonesia (wherever)? Ask your buddies in Washington to help.
That's just one example, and a friendly one. The not-so-friendly example is Qwest and Joe Nacchio. Or perhaps you lose lucrative government contracts for iPads. Or perhaps the Senate massively turns up the heat on your tax avoidance schemes, and it costs you billions because they have a record of everything you've ever said or done via NSA spying and know where you broke some obscure tax laws (guaranteed to happen at that scale). Or perhaps that damn pesky anti-trust case just refuses to go away, and instead is expanded, as the Feds start snooping around other business deals and practices (guaranteed to find something).
Or if this were the past, maybe they light Steve Jobs on fire in the options scandal, instead of being nice and letting it go away with the equivalent of a slap on the wrist (with a few patsy scapegoats).