If Warner runs against Allen, he is a definite underdog.
Jeffords WAS a REPUBLICAN!
Jeffords was also the biggest RINO in the Senate and probably the last progressive Republican. He voted against most of Reagan's agenda in the 80's. Plus he was initially elected back when Vermont was a more Republican friendly state and kept surviving by incumbancy.
Douglas didn't have a serious opponent last year and we all know governor's races are the ones people are least partisan in. Besides, why would he give up a safe governorship for a long shot Senate race?
The Democrats will not put up a serious candidate against Jeffords. They never do against Sanders, and why would they against either? Jeffords votes exactly like a Democrat anyway.