Edward Markey actually said...

Congress's involvement will be crucial in any successful diplomatic effort with North Korea.

I think we need to only give up sanctions directly related to concrete action on those things upon which the sanctions were imposed.

It is my hope that, during the summit, it will be made clear to the regime that the only goal of our negotiations is denuclearization.

I firmly believe they will insist on it, that this is a right that they believe is given to every country, virtually, to have a peaceful use...