How Do We Explain Obama's 35% Approval Rating?

Obama's approval rating is at 35%. How do you explain that? It never ceases to amaze me how slow people are. My Obama approval rating never went above zero. What I can't believe is that 35% of the people are still so stupid that they approve of this dirtbag and what he's doing to us. 

I've come up with a theory for why Obama's approval rating is still 35%. Approximately 25% of Americans suffer from mental illness in any given year. But how do we account for the other 10%?

Which political ideology, besides Islam, is the most Anti-American? Communism, of course. I decided to do a Google search to see if I could find out what percentage of Americans are Communists. A quick search told me that 11% of Americans think Communism is a superior system. 

Therefore, we can reasonably assume that 2/3 of Obama supporters are mentally ill and the other 1/3 are anti-American Communists.