U.S. allies are not celebrating Trump's midterm defeat, viewing the election results instead as another worrisome sign of a fickle electorate and unreliable partner.

In annual speech on threats, Ken McCallum, the head of MI5, cited a “major shift” in Tehran’s “ambitions” to attack military sites and other high-security targets.

The mixed signals expose a split in President Donald Trump’s approach to Russia, amid strain on energy markets.