Barrack Obama Fires Back At Hillary Clinton In Pennsylvania:

STEELTON, Penn. (AP) - Democrat Barack Obama lashed out Sunday at rival Hillary Rodham Clinton, mocking her sudden vocal support for gun rights and saying he understands the concerns of working class people.

"She knows better. Shame on her. Shame on her," Obama told an audience at a union hall here.

The drum-up to Pennsylvania's primary is going to be great.