Huawei emerged on the telecommunications equipment supplier scene a few years ago, & have thrown a spanner in the works for established players, mostly propped up by the heavy-handed US government, under its open markets policy. The pill is bitter to swallow, now that the roles are reversed, China wields more clout economically, & so the US Congress does what it does best: "release" a report that "warns" that Huawei & ZTE (another Chinese company) pose a "threat to US National Security". Of course, the report doesn't cite ANY evidence, but relies on "experts" to say that it is possible.
A moot question then would be to ask if any US companies that have supplied telco equipment to other countries should therefore also be regarded as a national security threat.