Of course DT didn't hear much of JEB for speaking constantly over him and everyone else.
Early in the campaign, Jeb Bush flubbed a question about whether his brother did the right thing by going into Iraq. It took him three tries to come up with a satisfactory answer about keeping us safe. Since then, Trump has been needling Bush about the Bush "legacy" and whether brother Bush kept us safe. Trump knows it gets Jeb Bush all flustered, distracted, defensive, and off-message when he brings it up.
The question now is who is getting hurt more by this line of attack, Bush or Trump? I think Trump, because Bush doesn't really have anything to lose. It may have stopped any Bush momentum early on in the race, but it's Trump's to lose now.
-PJ