Another US Debt Downgrade coming soon?

A Bank of America analyst has this:

We expect a moderate slowdown in the beginning of next year, as two small policy shocks—another debt downgrade and fiscal tightening—hit the economy. The “not-so-super” Deficit Commission is very unlikely to come up with a credible deficit-reduction plan. The committee is more divided than the overall Congress. Since the fall-back plan is sharp cuts in discretionary spending, the whole point of the Committee is to put taxes and entitlements on the table. . . . The credit rating agencies have strongly suggested that further rating cuts are likely if Congress does not come up with a credible long-run plan. Hence, we expect at least one credit downgrade in late November or early December when the super Committee crashes.