The secretary of State seemed to suggest economic sanctions over Ukraine are coming.
McCain said he is "very pleased" his "friend" Clinton can join this year’s forum.
Sergey Lavrov had implied the U.S. was pulling the strings in Ukraine.
The American Simon Ostrovsky was safely released and is in good health.
Russian officials have taken several actions that could give them more control.
Sen. Bob Corker (R-Tenn.) said Wednesday that it was critical for Ukraine to hold its election as scheduled on May 25.
One year ago, the collapse of the Rana Plaza garment factory killed 1,138 workers and injured another 2,500.
Kerry was hoping for a framework deal by next week.
A new round of violent clashes in eastern Ukraine left as many as five pro-Russian separatists dead on Thursday as President Obama threatened to impose a new round of sanctions on Moscow.
Caroline Kennedy said Obama has "been a great president."