Actually, it’s 25 dems up for re-election next year, if you count the two so-called “Independents”......Bernie Sanders of Vermont and Angus King of Maine, both of whom vote like RATS and caucus with them, too.
Maine’s conservative governor, Paul LePage, is term-limited from running for governor again next year. He’s been hinting of a challenge to Angus King, and would have an excellent chance of defeating King in November of next year.
Yes, you are correct about the “Indies”—really Dems in disguise.
Would love to see LePage beat King next year.