Talking Points Memo:

Today's Gallup tracking poll gives Hillary Clinton a four-point national leader over Barack Obama — the first time in several weeks that she's been able to claim that big a lead. Here are the numbers, compared to yesterday:

Clinton 48% (+3)
Obama 44% (-1)

Obama had been up 48%-43% two days ago, meaning there has been a potentially significant swing of about four or five percent over to Hillary in that short time.