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A Demo­c­ra­t­ic sen­a­tor is call­ing for fed­er­al inves­ti­ga­tions into pos­si­ble price goug­ing of nat­ur­al gas in the Mid­west and oth­er regions fol­low­ing severe win­ter storms that plunged Texas and oth­er states into a deep freeze that caused pow­er out­ages in mil­lions of homes and businesses.Minnesota Sen. Tina Smith says nat­ur­al gas spot prices spiked as high as 100 times typ­i­cal lev­els, forc­ing util­i­ties and oth­er nat­ur­al gas users to incur exor­bi­tant costs, many of which were passed on to customers.GET FOX BUSINESS ON THE GO …