Frontrunner tells fired-up Boston crowd he will go all the way.
Romney: “I’m not going to let you down. I’m going to get this nomination…. I stand ready to lead our party.”
Targets Obama and the economy: “To those millions of Americans who see jobs they can’t get & bills they can’t pay, you have not failed. The President has failed you…. Eight percent unemployment is not the best America can do; it’s the best this President can do.”