I do not believe Cruz will concede nor suspend his campaign.
There is the recently reported strategy, still in play, of challenging Trump’s delegates for their legitimacy, especially in the winner take all states, at the Convention. This may occur, according to the rules, before the first ballot is cast, or immediately thereafter. Trump can challenge Cruz’s delegates in the same way, and for similar reasons. Also, expect the delegates from the caucuses to be challenged, especially, if any of the other delegates from the primaries are challenged.
Tomorrow you will see McConnell and the rest of the them coming forth.
Didn’t know that...... The dirty tricks just keep coming. But the good news is we have Manafort.
LOL, is that you Rove?