The second leg of Quinnipiac's big national poll dropped this morning -- and it shows a serious erosion of support for Congressional health reform efforts and the president's performance on the issue -- along with an all-time low 46 percent approval rating for the POTUS. Most ominously for Dems: Nearly two-thirds of registered voters polled said extending coverage to 30 million-plus people will result in a decline in the quality of their own health care. That gives plenty of room to the GOP to personalize attacks on the plan, Obama and Congress. The lowlights for Dems: --O approval/disapproval: 46/44 percent....