Initial findings from a UCLA-led nationwide survey of more than 10,000 adults reveal some of the differences and similarities among whites, blacks, Latinos and Asians when it comes to the White House agenda on immigration, taxes and health care reform. Survey results showed significant differences in support toward both improving the Affordable Care Act and federal spending on Medicare, Medicaid and health services. Majorities from all groups — 77 percent of black respondents, 70 percent of Latinos, 68 percent of Asian respondents and 54 percent of white respondents — said they think that Obamacare should be amended and improved, not…