I wouldn’t doubt that Trump is doubling efforts in Indiana. Based on his schedule today....it seems he will not be satisfied with 1237....he wants 1400.
He needs more than 1237, in order to forestall any games by the GOPe, like turncoat delegates, Trump delegates refusing to cast a vote or not showing up, delegates changing the rules, etc.
If he has just barely enough delegates, the GOPE might try stuff. If he has much more than 1237, they're less likely to.