Negotiations hit snag as shutdown deadline approaches

Mick Mulvaney listens during a news conference on July 22 at the Department of Justice in Washington. (AP Photo/Jacquelyn Martin, File)

WASHINGTON — As the White House refused to rule out the possibility that the federal government may shut down again, negotiators clashed over whether to limit the number of migrants authorities can detain, creating a new hurdle for a border security compromise Congress can accept.