US fuel prices rise: Gasoline returns to $4 per gallon after Middle East flare-up

Average US gasoline price reached $4 per gallon, a level not seen in months.

Increase follows rising tensions and flare-ups in the Middle East region.

Crude oil prices have risen, contributing to higher global fuel costs.

Motorists in several states already paying over $4 for some time.

Higher fuel expenses may affect grocery prices and voter concerns in elections.