Confirm this fact is also being reported on radio broadcasts.NPR played the conference call as recorded and the verbal confusion suffered by the Senator as the medical event occured.( sic!)
The neurological damage of Asteriovenous Malformation can be similar to a stroke in which blood vessels rupture. The extent of the damage cannot be assessed until aftercorrective surgey, and in this case, will likely take a long time.
I feel sorry that he is caught in the middle of power politics, but the reality is that he likely will have to be replaced, and the Republican Governor will undoubtedly appoint a Republican, thus changing the balance of power in the Senate.
Unless he dies he will not be replaced. There will be no change in power in the Senate.