That is a possibility.
Trump thinks so because both he and Cruz are working hard to influence the selection of delegates that are loyal to them. This fact is clearly being overlooked by those who hold the All Powerful GOPe Theory that will give the nomination to Kasich or Romney if Trump doesn't make it too 1237. I don't believe that for a minute.
Yes, Trump could pull this off but I think he will have a large number of delegates who are ready to jump ship. Not enough to allow Kasich a chance but enough to let Cruz pull it out.
Just a theory, nothing more. It could be a second ballot Trump victory but just don't think that is in the cards.