Actually he is planning on running for Governor. MA has a history of being a very Blue State in national elections but often voting for Republican Governors. He would use the Governorship as a launching pad for the Presidency but I think he would yield to Christie first.
You can be sure, if he does run for Gov. his platform will not be 'end Mass care'. Everybody likes it!
This is why the GOP is so crazy eager to try and stop Obamacare. Once people use it, they'll like it, and it will be permanent, at least on the rode to single payer.
Employers will have to end their current bargain: "Sure we take advantage of you, but if we let you go and you get sick without healthcare, you could go bankrupt and or die." (actually that can happen quite easily even with healthcare as it current works.)