As 72 Lok Sabha constituencies across nine states, mostly in the Hindi heartland, go to polls today in the fourth phase of the 2019 Lok Sabha elections, the BJP will defend 45 of the seats it won in the 2014 Lok Sabha battle. These include 13 in Rajasthan, 12 in Uttar Pradesh, five in Madhya Pradesh, three in Bihar, three in Jharkhand, eight in Maharashtra and one in West Bengal. An estimated 12.79 crore electorate will be eligible to exercise their franchise in 13 seats each in Rajasthan and Uttar Pradesh, five in Bihar, eight in West Bengal, three in Jharkhand, six in Madhya Pradesh, 17 in Maharashtra and six in Odisha.