Great big giant money managers are selling their holdings of short-term U.S. government debt because they're afraid of what might happen if Congress fails to raise the federal debt limit.
Of course, it could well be that federal agencies will somehow find money stashed under a federal mattress, or the NSA will siphon some money out of some drug cartel's accounts and launder it through, say, some mysterious Federal Reserve Bank maneuver that everyone pretends to understand.
Even though disability insurer portfolio managers may prefer higher-yielding mortgages and corporate debt securities, they use plenty of government debt securities. They also depend heavily on the overall stability of the job market and the economy as a whole. Employers in seriously chaotic countries are not that big into offering disability insurance, or into offering employee benefits of any kind.
A modest proposal: Instead of continuing with the current gridlock, or descending into a foolish, 19th century-style shooting war, as we seem hellbent on doing, why not use modern technology to have the population go through a trial separation?