Agree. Liberal votes from NY may be split that may give the state to the Republican candidate. So, yeah. I don't think he'll hurt Rep more than he'll hurt Democrats.
Bloomy only won, because the alternative was soooooooo dreadful, that even a lot of Dems couldn't bring themselves to to pull the lever for him. But that would NOT translate, in a national presidential run; especially not with Bloomy as some weirdo fringe candidate.