Chad Wolf is acting secretary of DHS, and Ken Cuccinelli is the senior official performing the duties of deputy secretary. The Government Accountability Office says their appointments are invalid.

It is not clear why the invitation has not been accepted, but those familiar with the exchange say the delay is unusual, considering that absentee ballots will go in the mail as soon as September.

With the assistance of foreign partners, more than 1 million barrels of petroleum was seized from foreign-flagged vessels near the Strait of Hormuz, the Justice Department says.

A former bureau attorney is alleged to have doctored evidence to enable the surveillance of an ex-junior foreign policy aide to Donald Trump's presidential campaign.