The making of Obama’s Rebalancing Asia policy in his first term and the adjustment of the policy in his second term are shaped by domestic factors. First of all，Obama’s Democratic administration layout new foreign policy in order to differentiate its policy from Bush’s Republic administration which put the US in Iraq and Afghanistan war dilemma. It was also pushed by military sector，which is trying to get new financial support by setting new strategy in Asia-Pacific in the context of stiff budget cut. However，messy political situation in domestic will undermine the US capability to pivot to Asia-Pacific. The Congress is divided：the Senate is controlled by Republicans，the house is under Democrats. In such a situation，President Obama cannot get any support easily from the Congress. The rather worse is that leaders of Democrats do not favor his trade negotiation of TPP（Trans-Pacific Strategic Economic Partnership）and are reluctant to support the authorization of TPA（Trade Promotion Authority）. Therefore，whether Obama’s pivot to Asia can happen，the domestic front should not be ignored by observers.