President Bush spent Tuesday replenishing his party's coffers and, in the face of resistance to his Social Security plan and much of the rest of his second-term agenda, struck an aggressive new tone by accusing Democrats of standing for nothing but obstructionism. "I'm going to continue to call upon the United States Congress, members of both political parties, to stand up, to do what's right for a young generation of Americans coming up, to fix this Social Security system once and for all," Mr. Bush told a gathering of the Future Farmers of America on the campus of Pennsylvania State...