Ryan has gotten the message, that’s all. And he knows he’s second in line for the Presidency if some accident befalls Trump and his Veep.
We will find out if Ryan has gotten the message. Ryan is already facing a tough primary challenge from Paul Nehlen (Nehlen is beating Ryan in a recent poll of Ryan’s district 48-42) and the possibility of being ousted from his Speaker job by pro-Trump GOP House members should this non-endorsement nonsense become prolonged.
Trump doesn’t need Ryan’s endorsement as much as Ryan needs Trump’s assurance he won’t work to get him removed as Speaker and won’t get involved in Ryan’s primary election (Nehlen has already endorsed Trump).