The latest public opinion polls show President Bush and challenger John Kerry back in a virtual tie two weeks before the U.S. presidential election.

The daily tracking poll by Zogby International shows the candidates locked at 45 percent among likely voters, with seven percent undecided.

New York Times poll of likely voters gives the president a two percent lead, within the poll's three-point margin of error.

And Mr. Bush has a three-point lead in a  Washington Post  poll, right on the edge of that survey's three-point margin of error.

Some other polls in recent days showed the Republican incumbent building a small lead over his Democratic Party opponent.

Voting has already begun in more than 20 U.S. states that give residents the option of early voting.