In Kansas, Independent Greg Orman is just a hair’s breadth ahead of incumbent Republican Sen. Pat Roberts, according to the RealClearPolitics average of polls. Mr. Orman has said that if he wins, he will caucus with whichever party has the majority. If it's not clear who has the majority, he'll decide later, he has said.
Of the two independents in the Senate, Bernie Sanders of Vermont will stick with the Democrats. But Angus King of Maine may well side with Republicans if it looks like they’ll have the majority.