Why $4 per gallon gas this spring isn't out of the question

(NewsNation) — Don't look now, but gas prices are heading back up, and GasBuddy predicts the national average could hit $4 again in a couple of months. The price for a gallon of regular is up more than 13% nationally over the past month.Some states have seen prices increase by nearly $1 per gallon this month alone.Just six weeks ago, the national average was hovering around $3 per gallon. KRQE News 13 Gas TrackerSince bottoming out at that price, gas prices have steadily climbed. The curre