The number two Democrat in the US House of Representatives says Congress must approve funding to maintain production levels at Electric Boat’s submarine manufacturing plants in Rhode Island and Connecticut. Democratic whip Steny Hoyer of Maryland and US Representative James Langevin of Rhode Island toured Electric Boat’s Rhode Island facility Friday. They said it is important for national defense and the local economy to preserve funding for the production of two submarines per year. Electric Boat, a subsidiary of Virginia-based General Dynamics Corp, employs more than 10,000 workers at Quonset Point and Groton, Conn. Langevin and US Representative Joe Courtney, Democrat of Connecticut oppose a proposal by the Obama administration to fund construction of one submarine, rather than two, in 2014. Legislation to maintain funding for two submarines has passed the House and is under consideration in the Senate.