Respected political handicapper Charlie Cook on today's Daily Rundown. Nelson is vulnerable, to be sure, but is he "extremely, extremely vulnerable"? What do you think?

Critics noted that this clip appears on the YouTube account of Adam Hasner and say that Cook also commented on the "underwhelming" opposition so far. Cook was asked about four Democratic races in New Mexico, Michigan, Ohio and Florida and which would be a toss-up.

"I think, although the Republican field is unformed and underwhelming so far, I think Bill Nelson is extremely, extremely vulnerable in Florida. I just think he's somebody that has had extremely weak opposition ... ."