Joe Biden is calling on seven of the top oil companies to do something to help quell surging gas prices after accusing them of intentionally exacerbating the strain on Americans' pocketbooks after the average price per gallon surpassed $5.00. The president is sending letters Wednesday to Marathon Petroleum Corp., Valero Energy Corp., ExxonMobil, Phillips 66, Chevron, BP, and Shell to demand action on lowering gas prices at the corporate level and account for the surge. In a letter to Exxon obtained by Axios, Biden wrote that the difference 'of more than 15% at the pump is the result of the...