Question

By the time Johnson's tenure as president had ended, so had support for the Radical policies in the South.

Answer 1

No, generally speaking it is false that by the time Johnson's tenure as president had ended, so had support for the Radical policies in the South, since he was in favor of "forcing" a great deal of Civil Rights legislation through Congress. 

Answer 2

generally speaking it is false that by the time Johnson's tenure as president had ended, so had support for the Radical policies in the South, since he was in favor of "forcing" a great deal of Civil Rights legislation through Congress.