Oil tankers are loaded with crude in Corpus Christi, Texas, in December. The area has prospered in recent years due to the energy boom in the Eagle Ford shale formation, but falling prices could test that. Eddie Seal for The Wall Street Journal Retired Southwest Airlines co-founder Herb Kelleher remembers a Texas bumper sticker from the late 1980s, when falling energy prices triggered an ugly regional downturn: “Dear Lord, give me another boom and I promise I won’t screw it up.” Texas got its wish with another energy-driven boom, and now plunging oil prices are testing whether the state has held up its end of the bargain. The Lone Star State’s economy has been a national growth engine since the recession ended, expanding at a rate of 4.4% annually between 2009 and 2013, twice the pace of the U.S. as a whole. The downturn in energy prices now […]