A Kirk spokesperson says the 52-year-old senator checked himself into Lake Forest Hospital. He was transferred to Northwestern, where tests showed he'd suffered a stroke.My guess: if the surgeons are "very confident" in his recovery, more likely than not the stroke was not hemorrhagic, but embolic. If so, clinically asymptomatic atrial fibrillation is probably the most likely etiology for his stroke.
A statement from Kirk's office says the surgery was successful and that doctors are "very confident" in his recovery based on his age and health.
Our thoughts and prayers are with him and his family.
Addendum: Non-dominant hemisphere?
Addendum #2: 12:55 CST: Ischemic etiology reported.
Addendum #3: More detail - Spontaneous R carotid dissection?
Background on this.