Forget about going quietly into the night. Senate Democrats on Tuesday unveiled a broad agenda for an end-of-session sprint that, in other years, could be a whole year's worth of activity — ranging from an arms-reduction treaty with Russia to a major immigration bill to overturning the ban on gay troops. And that's not to mention the nearly 2,000-page, $1.1 trillion massive spending bill Senate Democrats said they'll try to push through. The bill contains hundreds of pork-barrel spending projects and new rules governing everything from airport baggage to detainees at the prison at Guantanamo Bay, Cuba. "We're not through....