How Republicans Sabotaged the Economy

I would go further and say republicans' disdain of Obama and outright prejudices affected their ability to reason, which led them to vow at the start of Obama's presidency to do anything in their power to oust him. Consequently, republicans blocked Obama in any way they could, even if it meant harming the economy. From Foreign Policy mag:

Imagine, for a moment, how difficult it would have been to land a man on the moon if half of the U.S. Congress had believed that the sun revolved around the earth. Or consider how the War in the Pacific might have progressed if half of Congress had still thought the world was flat. Or whether polio would have been eradicated if half of Congress insisted that the best cure was bleeding using leeches. Unfortunately, this was the situation the United States in January 2009, when Barack Obama assumed the presidency. The nation was trying to climb out of the deepest economic hole since the Great Depression, but the Republican Party had about as scientific an approach to the economy as medieval alchemists did to the periodic table.

Sometimes, mistaken ideas can be harmless or even humorous. But in a crisis, they can be downright dangerous. By the time Obama took office, Lehman Brothers had failed, and the Treasury was already trying to prop up banks and other financial institutions to prevent a complete collapse of the economy.

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Together, they would have to protect Americans from a prolonged economic slump while attempting to chart a course toward a more fiscally responsible future.

Not everyone in Congress was in a mood to cooperate. Stung by their electoral defeats and facing Democratic domination of both houses, the Republicans did everything they could to slow the new president's agenda, from filibusters and procedural votes to delayed appointments and partisan bickering. FP