“The US authorities also seemed bewildered by the idea, highlighting that there’s no mechanism for joining the USMCA.” https://www.dailymail.co.uk/news/article-10016271/amp/Boris-mocked-cunning-plan-join-Mexico-Canada-trade-area.html?__twitter_impression=true
https://www.dailymail.co.uk/news/article-9609739/amp/UK-farmers-fear-undercut-Canada-seeks-terms-Australia.html?__twitter_impression=true