I came across this painting at the old Market in Charleston, South Carolina last week, just across the way from the Confederate Museum. This probably explains the omission of various Republican Presidents who served in Union Blue (Grant, Harrison, Garfield, McKinley). It does not, however,explain the egregious relegation of Presidents Harding, Coolidge, Hoover, Johnson (the other Republic who faced impeachment), Taft and Arthur. I am certain there are several worthies here who could shoot pool better than Gerry Ford.
But what I really want to know, is what Lincoln said that the rest of this anachronistic tableau thinks is so gash darned funny. By all means, provide your own caption.