As part of a weeklong campaign around the Buffett Rule, President Obama’s re-election team is making Mitt Romney the face of income tax inequality. On a conference call with reporters Monday, top Obama surrogates blasted the Republican candidate for keeping years of tax returns secret, using offshore bank accounts for some investments, and enjoying a lower effective tax rate than most middle-income Americans. -snip- Durbin said. “And when is the last time a presidential candidate for the U.S. had a Swiss bank account? The answer is never.”