A good article for discussion around protectionist policies https://www.straitstimes.com/business/economy/china-manufacturing-slows-in-september-as-trade-war-worsens

See below where to find the relevant section within the specification for A Level Economics:

Edexcel spec reference 4.1.6 c) Impact of protectionist policies on consumers, producers, governments, living standards, equality

AQA spec reference The causes and consequences of countries adopting protectionist policies.

OCR spec reference P25  explain the impact of methods of protectionism