He says he questioned the idea of taking America "back to the good old days because those days weren‘t good for everyone" .
Republican leaders have expressed concerns over its effects.
Opponents say the bill could lead to legalized racial profiling of Indiana's Hispanic population.
Latino students oppose Indiana Senate immigration bill, fearing racial discrimination towards multicultural community.
The keynote address was given by Sonia Sanchez; a poet, professor and lecturer on black culture and literature.