A senate panel has finally managed to nibble around the edges of a tobacco bill, but its meeting was chock full of shouting, name-calling and gavel-banging, mostly among Republicans. Then, when the Senate Labor and Human Rights Committee stopped squabbling and began working, it had to disband for the second week in a row because an anonymous senator invoked an arcane Senate rule to halt the proceedings, for reasons they may or may not have anything to do with tobacco.