How solid is Barack Obama’s lead? NBC’s First Read notes that he’s led in 111 consecutive national polls whose methodology they trust:

Obama has now led in 111 straight national polls with methodologies we trust (looking back through the Pollster.com national trend), including the trackers back to Sept. 22-24 when a Gallup Tracking poll showed the race tied at 46%-46%. Since a Big Ten poll that showed McCain up 46%-45%, Obama has led in 117 of 119 polls.