"Sincere support to Senator JohnMcCain and his family and relatives! We care deeply and wish recovery of our reliable and true friend!" the President of Ukraine posted on his Twitter page.
Senator JohnMcCain underwent surgery to remove a blood clot on Friday at Mayo Clinic Hospital in Phoenix. Lab results from that surgery confirmed the presence of brain cancer associated with the blood clot.
As CNN reports, McCain is now recovering at his Arizona home. He and his family are considering treatment options, which will likely include radiation and chemotherapy, his doctors said.