I hate to break it to you but the base is already fractured. The behavior of all the campaigns including St trump has assured that. It remains to be seen if the schoolyard bully can switch gears enough to try to make friends with those he has stomped on
Its not an unreasonable assumption that Conservatives still supporting Cruz can be persuaded to support Trump with not much more then information that shows his positions without the filters and spin. With Trump its not trust or moral issues for the most part that are the problem.
On the other hand, Cruz is seen by many conservatives as dishonest, power hungry and pushing hidden anti-American agendas under a lawyer’s skill of manipulation. That’s not fixable when hes seen as one of the ones we have been fighting while the Brash Outsider is seen as being mostly right with some warts but there is no doubt he loves America and wants to help Americans.
Based on the above, the odds are good we can come back together under Trump but not under a contested convention.