ALBUQUERQUE, N.M. — State Sen. Gonzalo Barrientos of Austin passes up lunch at the Hilton for a $6 chili dog with sauerkraut. Sen. Eliot Shapleigh has asked his El Paso law partners to take on his clients. And Sen. Leticia Van de Putte took out a loan on her life insurance policy to make up for lost wages. In their 30 days of self-imposed exile, the 11 Texas Democrats who fled the state to block a vote on congressional redistricting have found their own ways of bearing the mounting costs of their political battle. Van de Putte, a San Antonio...