Russia`s concerns about NATO expansion are legitimate, the U.S. is ready to discuss this issue within the framework of peace negotiations concerning Ukraine. Such a statement Keith Kellogg, special representative of U.S. President Donald Trump, made in an interview with ABC News.

"This is a legitimate concern. We have already said that Ukraine`s NATO membership is not on the table, and we are not the only country saying this. You know, I could probably name four other countries in NATO, and for NATO membership approval, you need all 32 countries out of 32. This is one of the issues Russia will raise.

They are not only talking about Ukraine; they are also talking about Georgia and Moldova. We are saying, okay, we can pause NATO expansion near your borders. This is considered a security issue for them", - said Keith Kellogg.