How did the war of 1812 shift james madison's views on nationalism, and how did it have an impact on his presidency?

Because of the War of 1812, James Madison followed in Washington's steps and advocated economic nationalism. The War in his eyes showed that there is a need for a stronger federal government and that US had to have stronger military and better economy. That is why his presidency was a nationalist one and not focused on the individual rights of the states.

The answer is crop yield.