the system of checks and balances helps keep any one branch from gaining too much power. How is that system applied to the President's treaty making power.

The president has the power to make treaties with other countries (eg: trade deals), but the Senate has the power to review the treaty to agree to the terms or reject them. Specifically 2/3 of the Senate must agree for the treaty to pass. If the Senate overreaches, then the Supreme Court could step in to review if the move is constitutional or not. This is one example of all three branches interacting with one another.

the cost of college has risen faster than inflation for many years.

the high price of student services and administration are two reasons for the rapid increase in cost.

abraham lincoln, according to anyone who was connected with agriculture, represented the worst of northern politicians. shortly after lincoln was elected, south carolina seceded from the union. they along with other southern states, retained their anger. in a way, it was their own fault: the democrats were split in the south. some wanted slavery to be extended in other states that were about to join the union and some didn't want it badly enough. lincoln had a solid backing from his party: the republicans were united in not wanting slavery to be expanded.