It’s all but over for Hillary Clinton

It looks as though it's over for Hillary Clinton and that the Democratic candidate for the US presidency in 2008 will be Barack Obama. To keep her flagging candidacy alive, Mrs Clinton's task yesterday was to show that the white working-class vote that gave her victory in Pennsylvania would sweep her to another convincing triumph in Indiana. It didn't happen.

Mrs Clinton needed a robust victory by ten points or so, but in the end she eked out the slimmest of margins, 51-49, and late yesterday evening even this tiny lead did not look entirely secure.

For a while on Tuesday night it even seemed as though Indiana's Lake County and the rustbelt town of Gary might conjure from the overwhelmingly black vote an upset win for Obama. Meanwhile in North Carolina, Obama rolled to victory by 14 points.

Even by mid-afternoon on Tuesday the Clinton camp was giving the impression of being triumphantly on the verge of derailing Obama's drive with a big win in Indiana. Obama had had a rough couple of weeks trying to leap clear of the ferocious rhetoric of his pastor, the Rev Jeremiah Wright. Hillary Clinton whacked the war drum tirelessly and continued to threaten to obliterate Iran. It was the first time one could sense a certain desperation in Obama. There was something close to panic in his diatribes against Wright.

But Mrs Clinton's strategy didn't work, and there are no other big states left for her to contest. Primary season is all but over, with Oregon the only significant contest left, one which Obama could well win.

There is now absolutely no way that Hillary Clinton can argue that she can beat Obama in either the popular vote this primary season, or in the count of committed delegates. Already across this last week Hillary's last line of defence ­ the uncommitted superdelegates - showed a trickle of defections to Obama and the next few