What are some of the internal improvements that the US Congress paid for after the War of
1812?

This "System" consisted of three mutually reinforcing parts: a tariff to protect and promote American industry; a national bank to foster commerce; and federal subsidies for roads, canals, and other "internal improvements" to develop profitable markets for agriculture.

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )    

answer; i believe the correct answer is benjamin harrison;