Americans have begun casting their ballots in the biggest day of voting ever in a US primary race. It is also one of the closest electoral battles of modern times with the leading Democratic candidates in a dead heat and still a lot to play for in the Republican camp.
Almost half the US states are choosing who they want to run for president.
The battle between Barack Obama and Hillary Clinton of the Democrats is perhaps the most intriguing. Obama has made up ground in the latest polls and is tipped by some to win California – the big prize of Super Tuesday. It has the largest number of delegates to the nominating conventions in the late summer.
Clinton and Obama split the first four main states’ votes to have taken place. Since then she has seen a commanding lead erode.
Pollster Tom Bevan said: “On the Democratic side, the polls are showing a pretty significant movement toward Barack Obama. He is actually ahead in a few polls in California right now. And we have some national polls out now saying he is taking the lead nationally, and of course that matters when we are
approaching what is going to be the first real national — pseudo-national — primary that we have had before.”
John McCain appears in a stronger position over his rival Mitt Romney, commanding leads in most of the big battleground states like New York and New Jersey. But surveys show Romney on course to win in California, boosting his chances of staying in the contest after Super Tuesday.