According to probability theory, if you have A (one single condition), and A+B (two different conditions), A will always be more probable to occur than A+B. Not seeing this is called conjunction fallacy, typically elucidated as the Linda problem. In this case, though, we have one known thing (Huawei has tech support accounts), and one unknown thing (the NSA have access to Huawei's tech support accounts).
Huawei accounts alone are already at risk of being abused by Huawei. We don't know if NSA has access to the accounts. But even if they did, it would still be more probable that Huawei's access would be abused than the NSA using Huawei's access.
Huawei accounts alone are already at risk of being abused by Huawei. We don't know if NSA has access to the accounts. But even if they did, it would still be more probable that Huawei's access would be abused than the NSA using Huawei's access.
(edited a few times for clarity)