Over time, the spoils system developed into the

Over time, the spoils system developed into the: Political Machine System

In politics, a spoils system or patronage system is a practice where the winning party of an election gives its friends and supporters government civil related jobs, as a reward and incentive for working for the party. This created a lot of corruption in the US, the political machines developed thanks to this, and groups of people started controlling votes by using this spoils system.

not sure might be he acquired the entire oregon territory from great britain

the constitution gives congress the power to regulate commerce "among" the several states.