Abraham Lincoln vs Ulysses S. Grant/Rap Meanings

=== Abraham Lincoln: ===
Yo it is I, Abraham Lincoln, greatest US President of all time
(Many people consider Abraham Lincoln to be the best US President of all time. He even scored first place on WatchMojo's Top 10 Presidents of the United States of America list. Lincoln takes great pride of this title.)
And I'm gonna burn Ulysses S. Grant with my rhymes
(To burn someone is to diss them extremely well. Lincoln claims that his rhymes contain very excellent disses regarding Grant.)
I won the war, Grant made it less than civil
(Lincoln is notorious for winning in the Civil War. He makes a pun on his war's name by saying the war Grant took part in wasn't all that civil.)
Now he's in my face with his stupid drivel
(Drivel means nonsense. Lincoln claims that Grant is all up in his face and his rhymes are just nonsense.)
Yo momma so fat, she looks like William Howard Taft
(William Howard Taft weighed 243 pounds and therefore is very fat. Lincoln makes a basic joke saying that Grant's mom is so fat, she is very similar to Taft.)
You think you can beat me in rapping, but I won't allow that
(A generic line: Lincoln says he won't allow Grant to win the rap battle.)
You sent Sherman to burn hot-lanta
(My uncle wrote this line, so I don't know the lore behind it.)
But my rhymes will burn you so bad you'll be redder than Santa
(Santa Claus is the marketing mascot of Christmas and wears red clothes. Lincoln says his rhymes will burn Grant so bad, he'll look even redder than Santa's outfit.)
=== Ulysses S. Grant: ===
The greatest US President? Ha! You're just a big disgrace
(As Lincoln stated in his first line, he is considered by many to be the greatest US President. Grant, however, disagrees with these claims and says he's nothing but a big disgrace to America.)
Fly away on your bald eagle, because I'm gonna slap your face!
(In ERB's election battles (sans Donald Trump vs Joe Biden), a bald eagle drops Lincoln from the sky and he slaps Romney, Obama and Trump two times after spitting his rhymes. However, Grant says that the bald eagle from both those battles should pick him up and fly away as Grant will slap Lincoln this time.)
You won the war, ha; I made Lee surrender