The answer of this question is three!
The Gibbons v. Ogden court case in a nutshell:
Ogden had a monopoly on operating steamboats on the Lower Mississippi.
Gibbons, who had a federal liscence to operate steamboats, tried to start business there and was sued by Ogden.
The ruling was that Gibbons would be allowed to operate there, which gave precedent to federal law over state law.
The US and Brits wouldn't have access to Russia to send supplies and Russia is cold so both countries would have to wait till spring to counter-attack.
The harper's weekly cover depict black politicians in the south by illustrating a fight between the blacck politician of the north and the south, potraying the Irony that they don't get along even though they suffer the same tragedy in the country
hope this helps