So it seems a general get out the vote gimmick.
How does he know it isn’t going to get people to vote for someone other than himself?
Cruz can deny but people WILL attribute it to him, and it might push some fence sitters to Trump.
Obviously no targeting is 100%, but campaigns have tons of information on every voter in terms of whittling down who they should call, what doors they should knock on, etc. The newest tactics are to characterize voters so specifically that different messages are written to target each group they go after.