Here's what Romney did as governor:
Raised the tax burden, included higher taxes on gas.
Left the state a $1 billion defecit
Created higher unemployment, with targets on biomedical research (a major industry in MA)
health care laws enacted that he now opposes.
And? same sex marriage happened on his watch. (Not a bad thing,but his opposition was non-existent for something he is against).
Above from Youtube viewer:
Video care of TPMtv: more at cnn.com