AHC: Set up a 20th Century Anglo-American War

With a P.O.D. after the end of the American Civil War in 1865, can you somehow bring the Untied Kingdom and the United States to armed blows sometime between 1900 and 1940?

The general consensus in the Post-1900 thread seems to be that a 20th Century P.O.D. is too late, so I figured I'd give us some more breathing room.

Ideally, I would like said war to feature...

1) Ground combat between American and British/Canadian troops on the North American mainland
2) A Royal Navy attack on the East Coast of the U.S.
 
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