https://www.brookings.edu/articles/why-do-us-presidents-like-military-assistance/
https://www.atlanticcouncil.org/in-depth-research-reports/report/implementing-natos-strategic-concept-on-china/?mkt_tok=NjU5LVdaWC0wNzUAAAGJ_uISKKmK5ChQmYqp3FIy22EKhsuSDhecKS0SsZNJ1sV3V2fpPArSTKmn88kbPdZnR2NjVs1-ceAcrug_2H6hqtyE2xjvAZwEcKPyr82mlu0
https://www.brookings.edu/articles/ten-thousand-people-could-decide-the-presidential-election/
http://ftp.zew.de/pub/zew-docs/dp/dp20002.pdf