The USA has experienced substantial revisions to its climate policy and its international engagement since AR5 with implications still unclear . Since AR5 and until early 2020, many congressionally mandated federal efforts  faced programmatic challenges, but most continued to provide research and capacity development to support adaptation implementation across the USA. Importantly, the US government sustained the national climate assessments . Recently, the administration has re-engaged with the Paris Agreement and the USA has submitted an NDC ; however, adaptation was not directly addressed. Subsequent Executive orders mandate adaptation planning at the federal level . As of the time of this report, the US climate policy landscape is rapidly evolving, including major legislative initiatives  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report