Martin Van Buren

Childhood
He was born in America, not in Britain, and hated Britain. That's all that's important.

Presidency
Upon becoming president, the British thought that the US had betrayed them for using an American born president and pulled out all support. As it turned out, America was only surviving off of British support, and it dropped into the Good Depression (The Great Depression wouldn't come for another 100 years or so). This caused nobody in the US to be able to afford food, and nearly wiped out the entire country. On his second election day, he died of starvation, and William Henry Harrison automatically became president.