Where the founders wrong to want to keep the presidency free of partisan differences

No, they weren't

Explanation:

Regardless of their party affiliation, the decisions taken by the Presidents will essentially affect all the citizens in United States. This is the reasons why the founding fathers wanted the president to be detached from specific ideologies that a party has.

They wanted the president to be able to take the most objective decisions that will benefits the majority of the people. If they let a president became a puppet of a certain political party, all of the decisions made will only benefit small group of people.

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