This is just weird: Russia's SVR chief allowed into US to meet with DCI Pompeo
The chief of Russia's SVR has been specifically and personally forbidden entry into the United States of America for his part in the recent Russian expropriation of Crimea from Ukraine, which the US formally opposes. Allowing him entry into the country requires by law a special exemption from the Secretary of State that a visa be issued.
Of course, it could just be Russia begging the Trump administration as pointedly as possible under the circumstances to please —please— avoid fucking with Korea, the likelihood of which happening increases by the hour.