In the final days before the election, the US presidential race appears to be tightening again.

Race tightens

Latest national polls continue to show Democrat Barack Obama leading Republican John McCain in the race for the White House.

However, the size of Obama's lead is shrinking a bit.

US Democratic Presidential nominee Senator Barack Obama campaigns during an election rally in Sarasota, Florida, October 30, 2008. [Xinhua/Reuters]

The Gallup daily presidential tracking poll of 2,789 registered voters taken October 26-28 has two likely voter models.

One based on past voting behavior and current intention to vote shows Obama leading McCain 49 to 46 percent, while the second based on current intention to vote shows Obama up 51 to 44 percent.

The CNN survey shows that Obama is ahead 51 to 47 percent.

US Republican presidential nominee Senator John McCain listens as he is introduced at a campaign rally at Everglades Lumber in Miami, Florida October 29, 2008. [Xinhua/Reuters]

Among various polls, Obama's leading range is between 3 and 8 points, while the range was between 2 and 15 points Wednesday.

A new Ipsos/McClatchy Poll this week found McCain trailing nationally by 6 percentage points, 2 points closer than the week before.