Answer:
War and losing allies
Explanation:
Although taking over more land may be better, these countries being taken over or turned democratic may result in that country waging war. also other allies of the acting party may also leave because those allies don't want anything to do with other countries purely trying to protect themselves. a good example of this is us Americans. *he he.
So if you go around the world and talk about america around business owners and politicians, they'll be likely to shun you for it, because we are likely to police the world in any way we can trying to eliminate communism. This results in few allies and many enemies. Hope this helps.
The chance of German U-boats dominating the Atlantic was very slim as with destroyers for bases, Convoys, America joining the war and the cracking of the enigma code the Allies became very efficient at hunting down U-boats.
Supply to Britain would be dramatic as the Britain relied heavily on her colonies and overseas import for food and natural resources. This would of hurt Britain so much.
Britain wouldn't of been conquered even with the island half starving as getting onto the island was difficult. Britain would still force Hitler into a two front war but due to the success of the U-boats it wouldn't be as strong as the one in our timeline
Battle of the Bulge might of been lost by the allies, however this wouldn't change much for their situation as they already had plenty of troops on the continent, and the Germans would of run out of fuel
Salerno invasion still would of happened, as supplies could be brought from India, Africa and other British colonies
To answer your question, Supply lines to Britain would have been disrupted <span />
The correct word for it would be "<span>partisan politics", the reason why is because when they put their party agenda above everything else, they would be reluctant to change their mind according to the needs of the citizens.
Have a nice day! :)</span>