Obesity still plagues millions of Americans, as rates remain high in most states, a new report finds. The South and Midwest have the highest adult obesity rates, making up 23 of the 25 states with rates now topping 30 percent. In 42 states, blacks have obesity rates of 30 percent or more, as do Hispanics in 30 states.  Obesity rates of 30 percent or more among whites are found in 13 states, the findings showed. The obesity epidemic is one of the nation's most serious health crises