Ryan showing he is a wimpy coward. He wouldn’t stand up to the guy, Obama, at any point during the last seven years, but now that a girl is involved he is showing how tough he is.
Saying he’s a “coward” implies that he believed in conservative Constitutional principles in the first place. I do not think he ever did, and he instead is rather ardent about standing up for Obama rather than to him (and the same applies to the “presumptive Democratic nominee”).