1. Wait. I forget... Is Bloomberg a Democrat or a Republican? He's an "independent" now. He was a lifelong Democrat, until he ran for mayor (in 2001) as a Republican. He came out as an independent in 2007.
2. What does the mayor of New York have to do with Massachusetts? He was born in Massachusetts, grew up there, and went business school there.
3. Why did he pick Brown over Warren?
[T]he mayor had chosen to support Mr. Brown... for opposing a “national concealed-carry reciprocity amendment,” which would have required states to honor concealed-weapons permits issued by other states.Concealed-carry reciprocity "would let people with gun permits from rural states like Arkansas and Kentucky carry hidden handguns in New York City," according to the mayor's spokesman.
It's not as though Warren opposes gun control, but when you "take a tough stand and buck party orthodoxy that helps the city of New York, the mayor would like to support you."
Interesting. By the way, why specify "rural states like Arkansas and Kentucky"? That has a bigot-y feeling to it. I suppose they might mean that in a system of decentralized gun regulation, what's right for a rural state is different from what a place like NYC needs/prefers. Federally imposed reciprocity undercuts the federalism values inherent in letting the states decide for themselves. But "rural states like Arkansas and Kentucky" — to my ear — sounds more like disgust for hillbillies.