At this point, I'd rather him not run. He wouldn't try to keep Dems in check. So what is the point in getting him to run?
This is what you said. If there's "no point" in getting him to run, you appear to claim that a Senator Castle would vote practically the same way as any Democrat.
Do you also believe that Olympia Snowe or Susan Collins are as bad as a partisan Democrat?
It baffles me that you'd not prefer someone who votes your views 50-60% of the time compared to someone who never shares your opinions.
It's even higher than 50-60%, it's 80 freaking percent, I'd take Castle in a heartbeat.