I would suspect he’ll announce that Governor Whitey Pence is endorsing him. The GOPe will go all out again in Indiana to swing the vote to the canadian. The hatred of Trump only gets stronger the closer he gets to the nomination. Trump will counter with Bobby Knight’s endorsement and he’s more popular in Indiana than Whitey.
http://www.cnn.com/2016/04/27/politics/indiana-cruz-trump-republican-primary/
Pence won’t be there. Just announced he will be elsewhere this afternoon