Why is American government so against Huewei?

What's the real reason US Government don't want Huewei products in their territory?

There are several possible reasons and I'm curious to what the HN crowd believes.

1) US government is actually worried about Chinese products having backdoors in their Chinese chips inside, spying on users.

2) US government has backdoors in American chips (Intel, Amd) and does not want other tech inside territory that they cant spy on since it's a security risk from their point of view.

3) American government doesn't use backdoors and doesn't want other countries to use them either.

4) Other reasons?