As far as a Republican challenger goes maybe Berkowitz can do what is trending recently and run as a Republican. He won't loose any public sector union or entitlement vote. He's already got any LGBT vote. And it is fashionable for liberals to run as Republicans. Or liberals registered as Republicans to run as Independents with Democrats. Or liberals registered as Republicans running as Democrat sponsored write in candidates and then serving as registered Republicans. Are the odds good? Or are the goods odd?