In case 0bama does attack Pakistan unilaterally and the Pakis decide it's their last chance to go nuclear on India?
We will more likely see a gradual warming of ties between India and Pakistan when the moderate middle class especially in the coastal province of Sindh will get tired of their rabble-rousing Punjabi and Pashtun Islamist countrymen who want to keep them in the stoneage that Pakistan resembles.
America going to war with Pakistan’s Islamic establishment is actually going to be good for Pakistani-Indian relationship. China can be a military ally to Pakistan but there is no other country that is culturally and ethnically more similar to Pakistan than its mother-ship, India.