Barack Obama issued the following statement on North Korea's declaration regarding its nuclear weapons program:

"This is a step forward, and there will be many more steps to take in the days ahead. Critical questions remain unanswered. We still have not verified the accuracy of the North Korean declaration. We must confirm the full extent of North Korea's past plutonium production. We must also confirm its uranium enrichment activities, and get answers to disturbing questions about its proliferation activities with other countries, including Syria.

"The declaration has not yet been made available, so Congress has not had a chance to review it. Before weighing in on North Korea's removal from the list of state sponsors of terrorism, Congress must take the next 45 days to examine the adequacy of the North Korean declaration and verification procedures. Sanctions are a critical part of our leverage to pressure North Korea to act. They should only be lifted based on North Korean performance. If the North Koreans do not meet their obligations, we should move quickly to re-impose sanctions that have been waived, and consider new restrictions going forward."

John McCain issued the following statement regarding the North Korea announcement:

"The announcement today that North Korea has provided information concerning elements of its nuclear program is a modest step forward, as will be the destruction of the disabled cooling tower of Yongbyon. But it is only a step covering one part of North Korea's nuclear activities. It is important to remember our goal has been the full, permanent and verifiable denuclearization of the Korean Peninsula. That must remain our goal. The Six Party agreement called for North Korea to make a full declaration of all its nuclear weapons and nuclear programs. Many questions remain about North Korea's programs, including the disposition of plutonium at Yongbyon, the number and status of nuclear weapons, the nature of the highly-enriched uranium program, and the extent of proliferation activities in countries like Syria. I also want to make sure we fully account for the legitimate concerns of our South Korean and Japanes e allies as we move forward. I understand certain sanctions were lifted today, some may be lifted in 45 days, and others remain in place.

"As we review this declaration and attempt to verify North Korean claims, we must keep diplomatic and economic pressure on North Korea to meet all of its obligations under the Six Party agreement, including denuclearization. If we are unable to fully verify the declaration submitted today and if I am not satisfied with the verification mechanisms developed, I would not support the easing of sanctions on North Korea."