PoliticsWith Tories at His Back, Boris Johnson Can’t Cave In on BrexitVeteran and rookie euroskeptics pressure PM for a clean breakCompromises on sovereignty, fish may spark rebellionFacebookXLinkedInEmailLinkGiftU.K. Ports Gridlocked on Brexit StockpilingFacebookXLinkedInEmailLinkGiftGift this articleContact us:Provide news feedback or report an errorConfidential tip?Send a tip to our reportersSite feedback:Take our SurveyNew WindowFacebookXLinkedInEmailLinkGiftBy Joe Mayes and Kitty DonaldsonDecember 12, 2020 at 5:00 AM UTCBookmarkSaveLock This article is for subscribers only.Sign up to our Brexit Bulletin, follow us @Brexit and subscribe to our podcast.As U.K. Prime Minister Boris Johnson faces calls to compromise in order to secure a trade deal with the European Union, one thing above all is limiting his room to move: the Conservative Party.