Why was it so difficult for congress to fund its operation?

Congress found it difficult to fund its operations as the central government was weak and had no way of raising revenues. Congress relied on contributions from the states. The states were however reluctant to do that because they didn't want to give up their money

d. migration of french settlers into english colonies

lincoln won 212 electoral votes to mcclellan's 21 votes, and lincoln beat mcclellan. is the main reason lincoln won in 1864.