Illinois U.S. Sen. Mark Kirk is doing well, according to his doctor. Kirk suffered a stroke last weekend and has undergone two surgeries to relieve swelling in his brain.

Dr. Richard Fessler is a neurosurgeon at Northwestern Memorial Hospital. Dr. Fessler provided the following update on Senator Kirk’s condition Friday morning.

“Senator Kirk is doing quite well this morning. He is alert, responding more rapidly to questions and the swelling in his brain has stabilized. While he remains in serious but stable condition, we are pleased with his continued progress.”