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Here's another reason Collins and Murkowski are so essential to understanding what's possible in the Senate for the new GOP leader next year.
The number of wild card votes is dwindling with Manchin, Romney and Sen. Kyrsten Sinema (I-Ariz) on their way out.
The big picture: Romney told us there's still a core of senators who've "proven that they're not allergic to legislating."
He named four Republicans — Bill Cassidy (La.), Thom Tillis (N.C.), Todd Young (Ind.) and Jerry Moran (Kans.) — and Democrats Mark Warner (Va.) and Jeanne Shaheen (N.H.) as people who'll legislate.
Two more who could join: Rep. John Curtis (R-Utah), who will take Romney's seat next year, and former Gov. Larry Hogan, who is running a longshot bid for a seat in Maryland.