https://www.heritage.org/sites/default/files/2022-04/LM301.pdf
Amnesty Acts of 1872 and 1898. Four years after the Fourteenth
Amendment’s ratification, Congress exercised its power under Section 3
and passed the Amnesty Act of 1872 with the required two-thirds vote in
each House.15 The Act provided
[t]hat all political disabilities imposed by the third section of the fourteenth
article of amendments of the Constitution of the United States are hereby removed from all persons whomsoever, except Senators and Representatives of
the thirty-sixth and thirty-seventh Congresses, officers in the judicial, military,
and naval services of the United States, heads of departments, and foreign
ministers of the United States.16