Average US retail gasoline prices crossed $3 a gallon for the first time since November on Monday as the  conflict in the Middle East  worsened, setting up a key test of public approval of President Trump’s decision to attack Iran, analysts said. Tehran’s retaliation in response to US and Israeli strikes has disrupted global oil supply, as it hit production facilities in neighboring countries and ships in the Strait of Hormuz, a key global trade route. Oil prices have surged, with Brent crude