Packaging is something Intel does very well and they have facilities is the USA. The rumor is many companies might do final assembly with Intel.
https://www.eetimes.com/intels-embarrassment-of-riches-advan...
https://www.eetimes.com/intels-embarrassment-of-riches-advan...
https://newsroom.intel.com/intel-foundry/updates-intel-10-la...