Treasury Secretary Timothy Geithner expressed confidence in the resilience of the U.S. economy despite Europe's woes, slammed Mitt Romney's approach to China policy and dismissed as "remarkably hackish" a Romney adviser's critique of President Obama's tax policy.

Timothy Geithner

Geithner spoke in an interview with CNBC near Portland after touring a plant that manufactures street-cars, and as he prepares for an address in San Francisco tomorrow on economic relations with China.