So, first, a little context on Oaks as the performer. A basic summary from Charles K. Wolfe's Tennessee Strings, Oaks was a blind musician born (probably) in Kentucky but who lived most of his life in eastern Tennessee, playing at county fairs, political events, and street corners. He was a prolific composer, and examples of his broadsides survive from as early as 1904. Playing in east Tennessee would explain how Whitter heard the song, as he and his frequent musical partner, G. B. Grayson, were from near the east Tennessee border area and often played at fiddlers conventions and festivals in the area.

Let me also say that there are a few questionable spots in my transcription here, especially towards the end, where my recording gets pretty rough, however overall they paint a pretty good picture of the song and indicate Oaks's version is, if not the original, one of the earliest versions. I'm starting to question the relation of the sheet music due to the 4 lines per stanza, and the fairly major differences between the words of the sheet music and any of the recorded versions. The tune is, in my opinion, similar, but mostly passingly, though I'd have to sit down and play it to make totally sure of that -- 'hearing' sheet music has never been a strong suit of mine.

THE KAISER AND UNCLE SAM
(Charlie Oaks version)

Kaiser said to his counsel, "Let's go to the fighting line
We'll conquer France and England, and Europe will then be mine
But I want to keep peace with Uncle Sam"

The Kaiser said to his soldiers, "Come on boys, let's go
We'll conquer all of Europe and the world will be ours, you know
But I want to keep peace with Uncle Sam"

The Kaiser said to the Empress, "I will not say farewell
I'll never be killed by a Frenchman's gun or an English shot and steel
But I want to keep peace with Uncle Sam"

"We'll conquer little Belgium, and France will soon be ours
Then England will surrender with all the other powers
But I wanna keep peace with Uncle Sam"

The Kaiser saw the foodstuffs transported over the sea
The Kaiser said to the U-boat crew "This must no longer be
We'll have to run a bluff on Uncle Sam"

Then he began picking the vessels of a grand old U.S.A.
Then Woodrow said to the Kaiser, "This is a game we'll help you play
You can't run a bluff on Uncle Sam"

The Kaiser came to the trenches and to his great surprise
The brilliancy of our glory almost put out his eyes
If they'll keep peace with Uncle Sam

The Kaiser said to his chauffeur "Get the car up right and go home
I believe I've got the palsy my legs are trembling so
I see the flag* of Uncle Sam"

The Kaiser said to his servant "Put a pad between my knees
And then for my prescription, for I've got the heart disease
I hear the guns* of Uncle Sam"

Hindenburg said to the Kaiser, "You'd better get your guns"
The Kaiser said to Hindenburg, "Just give me room to run
I see the boys* of Uncle Sam"

"With the groups of France and England we can hold them all our hand
But the marksman tip of the Sammy we Germans cannot stand
We'll have two* from Uncle Sam"

The Kaiser said to Woodrow "I'll pay your million back"
But Woodrow said to the Kaiser "You'll have to ball the jack
You've gone too far with Uncle Sam"

* these phrases annunciated and drawn out in a sort of whinnying way, i.e. "fla-ah-ah-ag" or "gu-uh-uh-ns"