Is there a legitimate security concern or is it that Huawei is a potential threat to companies here in the US who sell similar or same products for far more?

Call me pessimistic, but anytime a government tells me something is a national security threat, my b.s. detector starts to go off.

Not to go completely on a tangent, but the goals of the US republic are to protect its elite. Everything else is just a distraction, IMO.