That's what he's led off with each time he's discussed the situation, including a few minutes ago. And he mentions his big heart and innocent young people when he declines to keep his promise to end the DACA program on day one.
If the plight of children is not affecting him, he sure is talking about it at every opportunity.
Yes, it's called politics. As for DACA, that's part of my evidence too. They've been saying that stuff for awhile now and yet I'm seeing reports of deportations of whole house holds and preparation for reuniting children with their parents.