Re: I don't think that will happen
Well, yes. The US government does have broad powers to exclude foreign companies. But it has to follow a bunch of rules when it does so. It appears to me that Huawei is arguing that the government has failed to play by the rules. They may well be right.
That doesn't mean that Huawei, even if they prevail in court, is actually going to get their gear into US government IT systems. It would likely just mean that the US government might have to do a better job of making their case(s) against Huawei (and ZTE).