The Wisconsin Democratic primary is today.  With the exception of a poll released on Sunday, every poll taken since Super Tuesday shows Obama with a significant lead, and the most recent poll has Obama ahead by 10 points

If Obama wins Wisconsin and Hawaii - and by margins large enough to give him a significant delegate lead - it becomes near impossible for Senator Clinton to gain a delegate advantage.  In fact, Clinton would have to win Texas and Ohio by huge margins to even tie Obama in pledged delegates.  And considering that Clinton and Obama are effectively tied in Texas (with Obama trending upwards), I doubt that will happen.

I’m actually going to predict that Obama beats expectation and narrowly wins Texas, while picking up a good chunk of delegates.  At that point, Clinton ought to pack it in.  She’ll have no hope of winning the nomination through pledged delegates, and because she’s staked her campaign on winning Texas and Ohio, a loss in either one would be a huge blow to her campaign narrative.

If Obama wins tonight, I think we should consider the race effectively over.