Barack Obama has notched his best showing in Gallup’s daily tracking poll since March, leading Clinton in its survey conducted April 11-13 by 50 percent to 40 percent. The margin of error is 3 percent. Gallup said Obama’s support remained strong during the weekend even after the news broke on Friday about his “bitter” remark. However, it remains to be seen how that story plays out in Pennsylvania which holds its primary next week. An American Research Group survey released earlier today, conducted over the same period, had Clinton regaining a significant lead.