Which of the following best accounts for the number of southern votes cast for Johnson’s impeachment?

Question

Only a few southern states have been readmitted to the union

Answer 1

This option best accounts for the number of southern votes cast for Johnson's impeachment because it suggests that the representation of southern states in Congress was limited due to the fact that only a few of them had been readmitted to the Union after the Civil War. This would have resulted in fewer southern votes being cast on the impeachment issue compared to other regions.