Houthi attacks on Saudi shipping risk adding a new front to the Iran war.

The move could increase pressure on already-strained global energy markets.

Houthi threats, Iranian strikes and a Hormuz standstill send oil surging as the US-Iran conflict enters its 10th day.

The Houthis' threats to block Saudi ports signify a troubling development in the Iran war, potentially raising US military commitments in the region. With a history of…