- Spiking a public option compromise that would have enabled individuals to buy into Medicare, which would have been easy to message in an election, popular, and sound public policy, not to mention a policy Lieberman once professed to support.
- Working with John Kerry and Lindsay Graham to produce some sort of bipartisan energy bill, initially a cap-and-trade bill, and then something else, all of which was dead on arrival in the Senate. Note that said work included sabotaging the work of Maria Cantwell and Olympia Snowe, who were engaged in some outside-the-box thinking to attract bipartisan support for a "cap-and-dividend" model (note that as in health care, we have establishment centrist Democrats with clunky compromises--Baucus, Kerry & Lieberman--sabotaging wonky centrist Democrat with more elegant solutions--Wyden, Cantwell.
- Muscling through the repeal of Don't Ask, Don't Tell.
Now, that said, in the context of Lieberman holding a Senate seat, Reid clearly made the correct decision not to punish Lieberman too harshly so as to keep him in the fold on a large number of issues. But this doesn't negate the fact that, on net, Joe Lieberman did more harm than his replacement would have done.