My prayers go out to Senator Johnson (D-SD). He's so young, too, not even 60 yet. I hope he's going to be ok. Neil Cavuto said that he's undergoing routine evaluation by a stroke team.
Unfortunately, some immediately focused on the political.
Update: Fox news alert: according to his spokesman, Senator Johnson did not have a stroke or a heart attack. That's good news.
Johnson became disoriented during a conference call with reporters at midday Wednesday, stuttering in response to a question.
Before he ended the call, Johnson appeared to recover and asked if there were any additional questions.
Fisher said he then walked back to his Capitol office but appeared to not be feeling well. The Capitol physician came to his office and examined him, and it was decided he should go to the hospital.
He was taken to the hospital by ambulance around noon, Fisher said.
"It was caught very early," she said.
In its earlier statement, Johnson's office had said he had suffered a possible stroke and was "undergoing a comprehensive evaluation by the stroke team."
Democratic Senate leader Harry Reid of Nevada went to the hospital to check on Johnson. He called Johnson a "dear friend to me and to all of us here in the Senate."
The White House also issued a statement wishing him a speedy recovery. "Our thoughts and prayers are with Senator Johnson and his family," said spokesman Alex Conant.