Perhaps by the end of the day Cambridge state Sen. Anthony Galluccio, who dodged all queries yesterday, will have come forward to attempt to explain this.  I cannot imagine what he will say to try to make it seem understandable why he was allegedly involved in a collision with another car on Sunday afternoon and then drove off — but based on his past experience offering an explanation of dubious credibility for an accident he caused, one should have no doubt that Galluccio will give it his all.