Gas prices jumped up again in Iowa in the last few days, and Iowa Senator Tom Harkin says there’s no explanation other than oil companies taking advantage of consumers. He says it’s speculation and he says he thinks the oil companies are “making a bundle” by raising their prices. Harkin, a democrat, says the oil companies are playing on fears of war. He says they’re using the uncertainty of the war to hike up their prices. Harkin says if we do go to war, he thinks gas prices will go even higher. Gas prices in the Des Moines area jump 10 to 15 cents in the last two days.