Three senators want residents in Florida and Louisiana to get the kind of mortgage help provided to Virginia homeowners whose houses contain Chinese drywall. Last week Sens. Bill Nelson and George LeMieux of Florida and Sen. Mary Landrieu of Louisiana wrote to Fannie Mae asking for help. In addition, Nelson and Landrieu wrote to Freddie Mac. Many whose homes were built with the material have moved out, juggling rent and mortgage payments. The drywall makes some homes smell bad and has been found to corrode metals and damage wiring and appliances and is suspected of causing breathing problems and headaches.