There were many different weaknesses that Andrew Johnson brought to the presidency, but the best option from the list would be "stubbornness" to go against the party system.
Answer:
The intent of separation of powers is to prevent the concentration of unchecked power and to provide for checks and balances, in which the powers of one branch of government is limited by the powers of another branch—to prevent abuses of power and avoid autocracy
Explanation:
I use gøøgle lol
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Germany quickly overran much of Europe and was victorious for more than two years by relying on a new military tactic called the "Blitzkrieg" (lightning war). Blitzkrieg tactics required the concentration of offensive weapons (such as tanks, planes, and artillery) along a narrow front.
The philosopher Jon Locke continuously refers to the laws of nature as being immutable--meaning that they cannot be altered or restrained by any person or political body.