Four

While Zobgy stayed at 7% in favor of Barack today, Rasmussen tightened a bit.

The Rasmussen Rasmussen Reports daily Presidential Tracking Poll for Friday shows Barack Obama with 51% of the vote, John McCain with 47%.
Over the past five days, Obama's lead has been between three and five percentage points each day. That's a bit tighter than the four to eight point margins enjoyed by the Democrat for the previous month (see trends).

The tightening comes entirely from McCain solidifying his support. The Arizona Senator has reached the 47% mark on two of the past three days. Prior to that, he had not reached the 47% level of support in over a month. Another way of looking at it is that McCain's support has now stayed at 46% or above for five straight days. Prior to that, McCain had only reached the 46% level four times in a month.
However, while McCain has been solidifying support, Obama has not lost ground.This is the 36th straight day that Obama’s support has been between 50% and 52%.