"To get a clear idea of the succession of events let us review [President Andrew] Johnson's actions in respect to the ex-Confederate States.
"In May, 1865, he issued a Proclamation of Amnesty to former rebels. Then he established provisional governments in all the Southern States. They were instructed to call Constitutional Conventions. They did. New State governments were elected. White men only had the suffrage the Fifteenth Amendment establishing equal voting rights had not yet been passed]. Senators and Representatives were chosen, but when they appeared at the opening of Congress they were refused admission. The State governments, however, continued to function during 1866.
"Now we are in 1867. In the early days of that year [Thaddeus] Stevens brought in, as chairman of the House Reconstruction Committee, a bill that proposed to sweep all the Southern State governments into the wastebasket. The South was to be put under military rule.
"The bill passed. It was vetoed by Johnson and passed again over his veto. In the Senate it was amended in such fashion that any State could escape from military rule and be restored to its full rights by ratifying the Fourteenth Amendment and admitting black as well as white men to the polls."