Democrats knew this when they elected Donnelly. He was going to upset you sometimes, but he was going to surprise you, too. He surprised many when he changed his closely-held views on same-sex marriage, for example. For the most part, Donnelly was elected not because he was some left wing shill. He was elected because of his "Hoosier common sense", and it was more than a campaign slogan. Donnelly, like Richard Lugar before him, reflects the sometimes confused political nature of the Hoosier State.
I have evolved on the blue dog Dems like Donnelly and Joe Manchin of West Virginia. There aren't too many of them left these days, and they represent the answer to the hyper-partisanship that currently ails the Senate. With Republicans taking out their moderates, that leaves us those of us wanting to actually see a functional Senate with these guys. President Obama will take care of the rest at his desk.
As far as the efforts to redefine the work week, 40 hours is a full week of work. That's an eight hour day, five days per week. Yes, it changes what is in the Affordable Care Act, but is it really that ludicrous? It's much more Hoosier common sensical than Senator Coats whose Affordable Care Act answer is always, "REPEAL AND REPLACE!"
I don't necessarily agree with Senator Donnelly's proposal, and I'm not saying you should either. I'm just saying that we shouldn't hate him for working with the other side in negotiation. That's what Republicans do. We're the big tent party, remember?
After all, it's not like he sold out and went and joined Fox News.