Expressed powers. Yes this is really the answer.
New deal gave people jobs and the elderly and disabled welfare while Hoover tried to increase trade by adding high taxes to foreign goods but in the process he lowered world trade as other countries raised their taxes on foreign goods to stop the us from trading with them as well. This caused the us to dip even lower while the new deal helped us out.
The capture of Vicksburg was significant to the Union because, as a result of this event, Texas, Arkansas and Louisiana were isolated from the rest of the Confederation and the loss also meant for the Confederation the loss of livestock and agricultural resources of the first two. Additionally, the victory at Vicksburg and the victory at Gettysburg the day before marked the beginning of the end of the civil war, while Grant with his victory increased his fame, which later made him commander-in-chief of the Union troops during that fight.
It doesn't increase or decrease, it just moves the population from one place to the other.