Yes, it is true that Benedict Arnold was first a hero then a traitor, although it should be noted that he was less a "hero" and more simply a well-respected war officer during the Revolution.
The Immigration and Naturalization Act of 1965, also known as the Hart-Celler Act, abolished an earlier quota system based on national origin and established a new immigration policy based on reuniting immigrant families and attracting skilled labor to the United States.
Dorothea Dix promoted and established the Asylum Movement, where mental institutions where created and health and hygiene in prisons was improved. This came after Dorothea visited and documented the treatment of prisoners and the living conditions within the prisons, both public and private. When she released her findings it shocked the general public, which lead to old hospitals being redesigned and repurposed for the use of mental facilities. The hospitals were built according to Dorothea's designs and with her guidance, there is now a widespread movement to reform the treatment of the mentally ill.
Yes as long as it's constitutional. If it is against the constitution then no.
