Why was andrew johnson being suspicious of abusing his executive power

Andrew Johnson (December 29, 1808 – July 31, 1875) was the 17th president of the United States, serving from 1865 to 1869. ... Johnson was a Democrat who ran with Lincoln on the National Union ticket, coming to office as the Civil War concluded.

Explanation:

Andrew Jackson was the seventh president and he served from 1829 to 1837.  He lost the 1824 election but won in 1828 because of expanded suffrage that allowed the common people he appealed to, to vote.  During his presidency, he made many controversial decisions especially regarding Native Americans and his authoritative style of governing.  Also, while he was in office there were many divisive issues,  particularly about states’ rights and the power of the Federal Government.  Overall, his presidency did not follow the central idea of democracy that is “by the people, for the people” and therefore it was not an era of democracy.