The US is a republic, not a democracy. Even Corporations at least give you a proxy vote.

U.S. Treasury: China Has Decreased Its Holdings of U.S. Debt | CNSnews.com
It looks like a smart move by China. I cashed my US bonds in as well. I had to pay nearly $10k extra in taxes on the interest.It's a republic, not a democracy. If I cannot vote on the issues I see no reason to have an investment. Even private corporations give you a proxy vote.