This is not what happened with the CNN exit polls. The real problem is that the GOP doesn't want to accept reality and then deal with it. The Reps problem is changing demographics fueled by misguided immigration policies. Political correctness and the delusion that they can somehow attract the majority of minorities and immigrants to vote GOP have prevented them from taking the necessary actions to address these problems. It is much the same way that Obama fails to identify radical Islamic fundamentalism as our enemy.
South Asians are even more difficult to target that way because they tend to be much more integrated than the East Asians. Still, there aren't really enough of either to make it possible to run a statistically valid exit poll to determine their preferences.
I can tell you from personal experience here in Fairfax County where there is a sizable population of both, they vote overwhelmingly Dem--as do all minorities and immigrants.
They are on a fool's errand politically since the white/black Democrat crowd around here are NOT going to ever give any of them a serious position in the party structure.
BTW, exit polls are not terribly exacting ~ everybody knows that, no one more than Algore and John Kerry!