Why do the Redskins always lose at home?

Their 3-4 at home. They beat New Orleans, Arizona, and Cleveland. They lost to Pittsburgh, Dallas, NY Giants, and St. Louis. I think they lose because they played tough teams and home field advantage is not as important in the NFL anymore. The last two weeks the road teams are 22-10 against the home teams. Also, they have no p rush and little offense. They should have easily beat Dallas and St. Louis at home but no offense kept the other team in the game until they eventually won it. Campbell is not the answer to the Skins offensive woes.