the phrase "all lives matter". After a sheriff's deputy in Harris County, Texas, was fatally shot while pumping gas in August, Sheriff Ron Hickman claimed that the rhetoric of Black Lives Matter activists had contributed to the killing and said, "We've heard 'black lives matter'. All lives matter. Well, cops' lives matter, too. So why don't we just drop the qualifier and just say 'lives matter', and take that to the bank.' Supporters of the Black Lives Matter movement criticized the "all lives matter" phrase, arguing that it minimized the systemic threats faced by African-Americans. President Obama said in October, "There is a specific problem that is happening in the African-American community that's not happening in other communities." Andrew Rosenthal wrote, similarly, in The New York Times, "The point of 'Black Lives Matter' is that the lives of African-Americans have come under special and deadly threat since before the birth of this country." Evidence of continued racial divisions in the United States can also be found in demographics. For instance, African-Americans account for less than 15 percent of the total population of Michigan, but more than 82 percent of the population of the state's largest city, Detroit — and Detroit, like many cities whose residents are predominantly black, has "resegregated schools, dwindling tax bases and decaying public services". There is a similar dynamic in Louisiana; the state was about 64 percent white as of the 2010 Census, but its largest city, New Orleans, is 60 percent black. Further segregation can be found within New Orleans: the Lower Ninth Ward, for example, is 97 percent black. This was the neighborhood that experienced the most catastrophic flooding after Hurricane Katrina, and the government's response to the disaster has been cited as evidence of the continued presence of racism in the United States. Most of the victims were black and poor, and class was a major factor in who survived: Those who lived in areas better protected from flooding, and those who were able to evacuate before the storm, tended to be wealthier. At the time, President George W. Bush acknowledged that this poverty had "roots in the history of racial discrimination, which cut off generations from the opportunities of America". Political implications The idea that America is post-racial, or close to it, has played a role in at least one United States Supreme Court decision. In Shelby County v. Holder in 2013,