After more than a week of Barack Obama and John McCain being tied in Gallup Poll Daily tracking, Obama now holds a statistically significant five percentage point lead in the preferences of national registered voters, 47% to 42%, slightly larger than Sunday's 46% to 42% lead for Obama.
This is according to Gallup Poll Daily tracking interviews from June 26 through June 29, with no surveys conducted June 27. (Complete trend here.)
Obama previously led McCain by a statistically significant margin -- peaking at seven points -- right after Hillary Clinton suspended her campaign for the Democratic nomination in early June. However, this lasted for only three days -- a mini-bounce -- after which the margin narrowed to three points, and more recently to an exact tie, before expanding in Sunday's report to a 4-point lead for Obama.
While the race has been consistently competitive for most of the past two months, McCain has not led Obama by a significant margin since early May.