A quick outlook on US GDP growth.

https://finance.yahoo.com/news/u-gdp-grows-above-forecast-123002246.html

The US economic growth was at 3.5% in the 3rd Quarter which was above forecast.

What were the growth sectors?

Inventory buildup was up.
Consumer spending was up.
Government spending was up.

What were the declining sectors?

Business investment was down
Net export was down.

In a nutshell, the US economic growth was supported by internal factors whilst the external factors were declining.