they may be able to do it in some house races because they've got better, more experienced candidates than the republicans do. but overall, they're worried that a lot of their candidates are just going to be swept out with a wave. >> gloria, thanks very much. all week, we'll be talking to you. probably for the next two months. always a pleasure. a great vantage point. >> reporter: beautiful pittsburgh. >> it's a beautiful city. cnn has learned that more nato troops may be headed for afghanistan. sources say 2,000 troops could go under a plan backed by general david petraeus. a nato official says it's likely some of them will be americans. sources also say a suspected u.s. drone attack has killed five militants in pakistan. intelligence officials tell cnn that missiles hit a vehicle carrying the suspected militants in a village in north waziristan on the afghan border. the attacks have sparked a lot of controversy in pakistan where critics say they tend to kill