More than a dozen governors have said in the wake of the Paris attacks that they do not want their states to accept Syrian refugees. But officials at several American refugee resettlement agencies said Monday that state and local officials cannot physically prevent refugees from being resettled in their areas. They said that all refugees who arrive in the United States must first be approved for legal entry by the federal government after a lengthy screening process and that their housing arrangements are made through long-term contracts and relationships with city, county and state governments. “Governors and state officials do...