The Wisconsin Republican drew sharp criticism for saying in a radio interview Tuesday that McCain had "a brain tumor right now. That vote occurred at 1:30 in the morning. Some of that might have factored in."
"I think my comments were completely misconstrued. I was trying to first of all defend John's position. A lot of us were pretty upset about the process, and I was also just being sympathetic with his condition," Johnson said on CNBC's "Squawk Box." "I've got nothing but a great deal of respect for John McCain."