Which Reconstruction plan set easy terms for the states to form new governments, and send representatives to Congress, but did not enforce the requirement that freemen be allowed to vote?

President Johnson's Plan.

Explanation: In 1865 President Andrew Johnson implemented a plan of Reconstruction that gave the white South a free hand in regulating the transition from slavery to freedom and offered no role to blacks in the politics of the South.  

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

uncle sam would be tossing and turning in his grave : *)