George Washington was considered to be the country's first federalist President. He was supportive of a sole government that centralized power and decided over the matters that concerned all of the states.
Within the first months of his presidency, Congress created executive departments like the Department of Treasury, State, War, and the Postmaster General. Washington proceeded to appoint Thomas Jefferson as Secretary of State, among other figures.
The Federal government proved to be not as strong as it should. This was proven with the Whiskey Rebellion in 1794. In order to raise money to pay the national debt, Congress imposed a tax on distilled spirits, which farmers considered to be unfair. Threats were placed against tax collectors. As a response to this, the government summoned the federal army. However, it was too small and had to retreat against the state militias.
Interesting question!
It is a huge misconception that there were no slaves in the north. Slavery was not as common due to the fact that the Northern economy was not as heavily agricultural as in the South. New York and Connecticut had large slave populations. <span> In the North they have cold winters and the South had mild winters. Meaning you would have to provide warmer cloths, food and warmer shelter which would cost slave owners in the North more money</span>