American governmental traditions come basically from what European country?

England

Explanation:

United States was colonized by The British Empire 1607 to 1783. (more than a century)

During that period, knowledge and cultural exchanges occurred between the two. This made America adopted a large portion of government tradition and economic system which operated by the British Empire.

For example:

- The current parliamentary system that is used by America was adopted from Westminster system which was developed by England.

- The Bill of rights that America introduced to the constitution was adopted from England's Magna Carta