Acknowledging it’s a bad time to seek money from Washington, U.S. Sen. Johnny Isakson said Wednesday he’s pushing for federal funding to deepen the shipping channel to the Port of Savannah by year-end. The Georgia Republican said during a visit to the bustling seaport that the harbor deepening is his top issue to discuss with President Barack Obama next week when the president joins Isakson and other GOP senators for dinner. They’ll be dining the same day Obama plans to release his proposed budget, which Georgia port officials hope will include money to start construction on the $652 million project.