A recent lobby by the AFL-CIO to request renegotiation of the ROK-US FTA is a serious blow to the faith the world has in America. Besides, the ROK-US FTA had been negotiated under the working-level talks to reflect understandings and benefits of both parties. Requesting a renegotiation is utterly dismantling the previous efforts which is based on rational judgements. Most of all, the renegotiation of ROK-US FTA is against the foreign policy of Obama Administration which emphasized the trust and cooperation between the allies. Therefore, the U.S congress should swiftly ratify the agreement to promote ROK-US alliance and the worldwide cooperation.