Sen. Barbara Boxer (D-Calif.) took the U.S. rental car industry to task Tuesday for declining to take her pledge not to rent cars that have been recalled by the National Highway Traffic Safety Administration. Boxer has been pressuring the largest car rental companies to volunteer to abide by the rules of a bill she and Sen. Charles Schumer (D-N.Y.) are planning to introduce that would require them to pull recalled cars from their fleets.