New York, July 9 -- During a live segment on a cable news network, from a sports bar in France where patrons were celebrating the United States women's World Cup Championship, a profane chant about President Donald Trump broke out.

The First Viewer was not pleased.

But the object of his ire was not CNN or MSNBC. It was his favorite outlet, Fox News Channel, and the president issued a not-so-veiled threat about the network's programming.

No president has been so closely aligned with a single news outlet as Trump is with Fox News, so his criticism carried added significance. While it was not the first time he has singled out Fox, it was the most pointed, raising the question of how the network, and the president's supporters, would respo...