But Minnesota does not have a 50 percent rule similar to Georgia's, so either Coleman or Franken could win the seat with less that 40 percent of the vote.
Barkley, according to political experts, has been successful in garnering support from voters who are tired of the Coleman and Franken horserace.
"Barkley is sort of the opt out choice for people who are sick of Coleman and Franken," said Duffy. "Watch Barkley's number all night -- I'd expect whoever wins might only win with 38 or 39 percent of the vote."
Duffy adds that while Obama has been doing well in Minnesota -- the Star Tribune/PSRA poll shows him leading McCain 53-42 -- voters in the state have been known to split their tickets.
"I wouldn't be surprised to see Coleman do well even if Obama is doing well," said Duffy.
Zelizer said that while Coleman has remained popular during his tenure in the Senate, he has suffered from "the implosion of the GOP."
The latest poll by the Star Tribune/PSRA on Oct. 31 has Franken leading Coleman 42-38
"Like Dole in North Carolina, Coleman is being dragged down by a party he is often at odds with," Zelizer said.