Trump tests his limits

But this protracted battle, now entering a fourth day, is testing the limits of his bullying, no-apologies political approach in a way no other self-inflicted wound or crisis has.

.. “I understand they challenged him, but there’s some things you just can’t win and you shouldn’t engage in. [Trump] wanted to change the subject to radical Islamic terrorism — which is what this guy died fighting. He just can’t win the argument and needs to shut up about it, but his personality won’t allow him to do that.

.. Over the weekend, longtime Trump ally Roger Stone suggested that a link between the Khans and the Muslim Brotherhood. (In a later Tweet, Stone issued a “correction” to instead accused Khizr Khan of being linked to a Saudi financier of the Sept. 11 terror attacks.)

.. But by doing this, he’s really hurting himself in his efforts to woo undecided voters.”

.. Trump’s chorus of prominent Republican critics includes few leaders who are ready to rescind their endorsements of him altogether. And they may hold firm until Trump begins to hurt their own reelection chances or standing with constituents.

.. “But if they flat-out reject him, they risk alienating a significant portion of their base.”

.. His pivot, however, was not to attacking Clinton, but rather to a lengthy riff in which he bragged about winning the GOP primary, slammed CNN and spoke angrily about his supposed mistreatment by the media.

He also suggested, for the first time, that November’s election will be “rigged” against him.