Completed the following sentence: After his term expired in 1865, Armstrong moved to Cleveland, bought "The Plain Dealer", and edited it until 1883. 1868 he testified at the impeachment trial of President Johnson.<unk> 1868 he testified at the impeachment trial of President Johnson. ąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąą
1880, and 1884.