The scandal proved to be president nixon's undoing.

The "Watergate Scandal" proved to be President Nixon's undoing, since it was shown that President Nixon had played a role in the break in and theft attempt at the Watergate Hotel. 

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from the conditions of the working class in england by friedrich engels,the main idea is :

manchester's leaders hoped to oppress its working class to benefit factory owners.

Both countries had to aprove annexation.