Exit poll data on MSNBC says 11% of voters in Indiana were Republicans and 53% of them voted for Clinton. 45% voted for Obama.

These numbers will be tweaked as final results come in, but it looks like about 4.5% of all voters will be Republicans for Obama -- exactly the same as his average for the previous eight open primary states with exit poll data on Republicans.

Meanwhile, Clinton looks set to get a little over 5% -- more than the 4.8% she averaged in Ohio, Texas, and Mississippi.

I'll bet that once we dive deep into the exit poll data, we'll see that about 3-4% of all voters were pro-McCain Republicans for Clinton. Keep that number in mind as numbers roll in throughout the night.