Mitt Romney, the U.S. Republican presidential candidate, supports the six-party talks on North Korea's nuclear program but he wants Pyongyang to stop misusing the often-troubled negotiations, a senior foreign policy adviser to the former Massachusetts governor said Wednesday.

"Well, his (Romney's) concern is not to let the North Korean nuclear program proceed," Dov S. Zakheim, special adviser on foreign policy and national security for the Romney campaign, told Yonhap News Agency.

He was emerging from a debate on the national security agenda for this year's presidential elections, slated for Nov. 6, in which Romney is apparently staging a neck-and-neck race with President Barack Obama.

"So, you know, we've gotta watch that very, very closely and make sure that the North Koreans don't exploit these talks in order to increase their arsenal," added Zakheim, formerly a ranking Pentagon official.

When asked whether Romney does not support the six-party talks, he tersely responded, "No. Who said that? Of course he supports the talks."

His comments were one of the clearest expressions of the Romney camp's view on the talks, which have stalled for more than three years.

With voters' attention focused on the economy and other domestic issues, neither candidate spends much time on the trail discussing national security.

Romney sometimes has talked about economic disparity between the two Koreas, but he has not gone into details of his policy vision for the Korean Peninsula.

The six-way talks, launched in 2003, involve the two Koreas, the U.S., China, Russia and Japan.

Critics accuse North Korea of having followed a pattern of gaining political and economic concessions from its dialogue partners and returning to provocative acts to increase bargaining chips. (Yonhap News)