Bank of America Chairman and CEO Brian Moynihan cautioned that while the American consumer remains a powerful force keeping the economy afloat, the middle class is beginning to feel the strain. Joining "Mornings with Maria" on Tuesday, Moynihan shared his outlook on the average U.S. consumer and warned the economy could slow down amid the ongoing government shutdown."You're still seeing growth among median income households, at up to … 75,000, 100,000. They're still growing, but they're growing at a slower ...