WASHINGTON – With the push to overturn flight restrictions at Dallas Love Field heating up, a schism has emerged among North Texas lawmakers. Three of the region's eight House members – all from the Dallas side – say it's time to loosen or scrap the 25-year-old Wright amendment. "I think it's outlived its usefulness," Rep. Sam Johnson, R-Plano, said Thursday. "That doesn't mean it's going to get repealed this year." The willingness of Dallas-area lawmakers to openly side with Southwest Airlines Co. against American Airlines Inc. represents a fresh threat to American and Dallas/Fort Worth International Airport. Both have been...