As expected, Sen. Barack Obama won the Democratic primary in North Carolina. But by the narrowest of margins, he lost in Indiana to Sen. Hillary Clinton, who reminded supporters that her rival had called the state “the tie-breaker.”

According to the latest story by the AP:

Obama was on track to climb within 200 delegates of attaining the prize, his campaign finally steadying after missteps fiercely exploited by the never-say-die Clinton.

His campaign dropped broad hints it was time for the 270 remaining unaligned party figures known as superdelegates to get off the fence and settle the nomination.

Meanwhile, “Clinton vowed to compete tenaciously for West Virginia next week and Kentucky and Oregon after that, and to press ‘full speed on to the White House.’”

There are six primaries left before the primary season is over. We’ve enjoyed your political commentary and insights here after previous “key” primary nights.

Now what has to happen?