President Barack Obama said Thursday that being American “is not a matter of blood or birth,” but said that “no matter how decent” the 11 million illegal immigrants in the U.S. are, they should be held accountable for breaking the law. Speaking at the American University School of International Service in Washington D.C., Obama expressed an understanding for why states would pass individual anti-illegal immigration laws, but said taking such action is “ill conceived.” The president said laws, such as the one signed by Arizona Gov. Jan Brewer in April, are “divisive,” put pressure on local law enforcement, burden state...