The Hindi heartland, at the heart of the BJP's spectacular win in 2014, will vote in the fourth phase of the ongoing Lok Sabha elections today. The BJP and its allies had won 56 of the 72 seats up for grabs - an impressive strike rate of 77 per cent but an equally large score to defend. From more than half-a-dozen union ministers to movie stars - there are several high-profile contenders whose fortunes will be decided today.