Gaius Sallustius Crispus, generally known simply as Sallust, (86-34 BC), a Roman historian, belonged to a well-known plebeian family, and was born at Amiternum in the country of the Sabines. Throughout his career Sallust always stood by his principle as a popularis, an opposer of Pompey's party and the old aristocracy of Rome.
"Long" John Wentworth, whose nickname was inspired by his stature (6'6", 300 lbs.)started out as managing editor of the Chicago Democrat, later to become owner and publisher. He served six terms as an Illinois Representative to the U.S. House of Representatives, from 1843 to 1851 as a Democrat, and from 1853 to 1855 as a Republican. It seems fair to speculate that his party change was due to his personal friendship with Abraham Lincoln.
Wentworth served two terms as Mayor of Chicago, in 1857/1858 and again in 1860/1861. I cannot be sure which campaign it was that inspired this utterance.