In 1851, Johnson was elected to the
United States House of Representatives as a
Unionist. Some historians labeled him a
Whig, but in the later 1850s, he was a member of the American, or
Know-Nothing, party. He was defeated in his re-election bid by Alfred H. Colquitt in 1853. Johnson opposed
secession, and historians agree that he kept a low profile during the
Civil War. Johnson was appointed as provisional Governor of Georgia on June 17, 1865, by
U.S. President Andrew Johnson (unrelated), and tasked primarily with reorganizing the state government, which had collapsed with the
Confederacy. He served until a constitutional convention was held in
Milledgeville in October 1865; at that convention, the Secession Ordinance was repealed, a new constitution was adopted, and the State's war debt was repudiated. He unsuccessfully ran for the
U.S. Senate, but on January 30, 1866, the legislature preferred Alexander H. Stephens and
Herschel V. Johnson. ==Postbellum life==