The story

Barack Obama came out of Super Tuesday about 100 delegates behind Hillary Clinton in the total delegate count. But Obama's momentum was unmistakable and Clinton faced some must-win contests if she was going to keep up.

Obama was on a roll and won seven successive contests taking him ahead of Clinton in the delegate race -- but not by enough to end her challenge.

For Clinton, Ohio and Texas on the same night and then Pennsylvania, became all-important. On March 4, she had to win both Texas and Ohio, and she did. In Pennsylvania, pundits said she needed to win by 10 points, and she did. Read full article »