A political opponent of Obama might say:

Basic economics says that what you pay for, you get more of. Therefore, when you extend long-term unemployment benefits, you get more long-term unemployment.

or

The current tax rate is too far to the right on the Laffer curve

or

The health insurance purchase mandate is unprecedented, UnAmerican, and unConstitutional

edit: or

People who pay no net income tax (because of low income and earned income tax credits) are drains on American society

(end edit)

without me thinking that the political opponent was intending to invoke Obama's race in some way. None of these are actual quotes, but I think they are coherent assertions that disagree with Obama's economic or legal philosophy. Edit: I feel confident I could find actual quote of equivalent content.