Are you sure that was La Raza President Bush addressed?
Yes, back when he was running against Al Gore, he addressed La Raza (NCLR), I believe during their 2000 National Council.
http://abcnews.go.com/Politics/story?id=123436&page=1#.Tw45OCO6_cE
Bush, the governor of Texas and son of former President George Bush, told the National Council of La Raza annual conference he wanted immigrants to the United States to be welcomed with open arms rather than by a hostile Immigrant and Naturalization Service bureaucracy, as is often the case today.
“We will bring to the INS a new standard of service and culture of respect,” Bush told the nonprofit organization, which seeks to reduce poverty and increase opportunity for Hispanics.