INDIANAPOLIS: Barack Obama and Hillary Clinton faced a new day of destiny on Tuesday with Democratic primaries in Indiana and North Carolina, as the climax approached in their gripping White House race.

Opinion polls pointed to another messy draw on the biggest single day of voting left in the epic battle for the Democratic nomination, with Obama tipped to win in North Carolina and Hillary ahead in Indiana.

Voters lined up before sunrise in the capital of the mid-western state of Indiana, where the first polling places opened at 6am (1100 GMT) under overcast skies.

The day’s voting closes in North Carolina at 8:30pm, with a combined total of 187 pledged delegates on offer in the two states.

Whatever the outcome, neither candidate can win enough delegates on Tuesday to secure the Democratic presidential nomination.

But victory or defeat in either state could sway the “superdelegates” set to cast deciding votes in the stalemate.

“This is going to be a tight race,” Obama told union workers in Evansville, Indiana just after midnight as he closed out a final campaign push. “Every poll shows a dead heat.” The rivals raced through both states in a frenetic dawn-to-midnight campaign swing on Monday but both signalled the contest would drag on through the bitter end of the primary calendar, on June 3 in Montana and South Dakota.

“We hope to do as well as we can, we started out pretty far behind,” Hillary told reporters on a late-night flight across Indiana.

The former first lady also took another swing at Opec, after oil prices busted the symbolic $120-a-barrel barrier.

“They can no longer be a cartel, a monopoly that get together once every couple of months in some conference room in some plush place in the world,” Hillary said, sparking cheers in a fire station in Indiana’s Chicago suburbs.

Hillary’s camp admits she cannot overtake the Illinois senator in the count of pledged delegates who will formally anoint the nominee at the Democratic convention in August.

So she is pinning her hopes on persuading nearly 800 superdelegates, who look set to have the deciding vote, that he cannot beat Republican presidential candidate John McCain in November.

But Obama dismissed Hillary’s claims he may be a general election liability, after a punishing month in April which sucked some of the euphoria out of his candidacy.

“Once you’re the front-runner, then it is, I think, the obligation of the candidates who are behind to try to whack you over the head, and the press is happy to oblige,” Obama said.

“So there was a kitchen-sink strategy employed that was throwing a whole bunch of stuff at me.

“But if you think about it ... the fact that we’re still standing here and still moving forward towards the nomination, I think, indicates the degree to which the core message of this campaign is the right one.” Hillary was due to spend election night in Indiana, while Obama was heading back to North Carolina later on Tuesday.Analysts say Hillary, 60, needs to take the rustbelt state of Indiana to at least halt a flow of Democratic superdelegates to Obama and stay in the race.

On the final stretch of campaigning, the two rivals fought a vicious television advertising war.

“What’s happened to Barack Obama?” asked a Hillary ad, focusing on his dismissal of her plan for a temporary moratorium in gasoline taxes, but also highlighting his recent troubles.

In Indiana, a rolling average of polls by RealClearPolitics.com gave Hillary a five-point lead over Obama about 49 per cent to 44. In North Carolina, which has a large black population, Obama was ahead 50 to 43 per cent.

RealClearPolitics gives Obama 1,491 pledged delegates from all the races so far to Hillary’s 1,337. Neither can reach the winning line of 2,025 without backing from the superdelegates, party officials free to vote either way.—AFP