Columbia (female personification of the USA) stands before a wall separating two groups.  On the left is Boss Tweed reaching into a bag with three companions standing beside him: an arch behind is labeled "SCHOOL FOR THIEVES".  On the right are the Liberal Republicans:  Thomas W. Tipton, Carl Schurz, Lyman Trumbull, Horace Greeley, Reuben Fenton and one other:  an arch behind is labeled "SCHOOL FOR SCANDAL".  Both factions are identified with the McClellan-Vallandigham campaign of 1864: "1864 - Anything to beat A. Lincoln; 1872 - Anything to beat U.S. Grant".
<bdi><a href="https://en.wikipedia.org/wiki/en:Thomas_Nast" class="extiw" title="w:en:Thomas Nast"><span title="American cartoonist (1840–1902)">Thomas Nast</span></a>
</bdi>
1872-05-04
Harper's Weekly, May 4, 1872, p. 352.