Speculation on which Republican member of the Senate Foreign Relations Committee centered on Lincon Chafee of New Hampshire, one of the most liberal GOP senators.  However, it appears that GOP Senate powerhouse Chuck Hagel may deliver the final blow:

"At this point, I will ... but I have been troubled with more and more allegations, revelations, coming about his style, his method of operation," said Hagel, the committee's No. 2 Republican.

"We need a uniter," he told CNN's "Late Edition." "We need a builder. We need someone who will reach out to our friends and our allies at the United Nations."

Don't count out Chafee yet, either.