According to Rasmussen, here are the reasons of the vote

[Mass]

http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/massachusetts/brown_wins_stunning_victory_in_massachusetts

78% of Brown voters Strongly Oppose the health care legislation before Congress.

· 52% of Coakley supporters Strongly Favor the health care plan. Another 41% Somewhat Favor the legislation.

· 61% of Brown voters say deficit reduction is more important than health care reform.

· 46% of Coakley voters say health care legislation more important than deficit reduction.

· 86% of Coakley voters say it’s better to pass the bill before Congress rather than nothing at all.

· 88% of Brown voters say it’s better to pass nothing at all.

Now, they dont ask why they oppose the healthcare reform, but my guess would be that it is perceived cost.

How the vote went (which correspond to what the map of results shows)- Now, this is not an exit poll, but the revenue issues correspond to the repartition of votes. It was already striking when the results came.

* Brown leads among middle-income voters ($40,000 to $100,000).
* Coakley leads among those at upper and lower end of income range.