Hey buddy you do realize your arguing with someone that does this for a career. The US markets recovered the losses caused by the news of the downgrade within 5 days. The reason for the downgrade wasn't political as much as the Dems tried to paint it as such. Again I actually read these documents and I understand how agencies rate debt. They downgraded because the US wasn't able to make enough progress on medium term debt reduction. But it still didn't matter because the market paired back its losses within a few days.
There were no losses in the markets the agency was "rating" ie US government debt. The hack ratings agency downgraded US debt and the market rebuked them and debt rallied to historic highs. In short they have no idea what they are doing.