OFF TO THE RACES: "Apoplectic"
NBC's Katy Tur reports that RNC chairman Reince Priebus is "apoplectic" over Trump's refusal to endorse Paul Ryan.
Here's the full Washington Post story on Trump's refusal to back the House Speaker - as well as John McCain and Kelly Ayotte.
The New York Times: "For days, Mr. Trump's top advisers and allies have urged him to move on from the feud, which erupted when Mr. Khan criticized him at the Democratic convention, and focus instead on the economy and the national security record of his Democratic opponent, Hillary Clinton. Yet, facing outcry on the left and right, Mr. Trump has insisted to associates that he has been treated unfairly by Mr. Khan, the news media and some Republicans, said people familiar with the campaign's deliberations who insisted on anonymity to discuss them."
And from the Wall Street Journal: "Donald Trump is confronting the roughest patch of his presidential campaign, with even some of his strongest supporters urging him to shift gears and focus more on policy than personality. Republican defections began to multiply Tuesday, including the first GOP member of Congress to endorse Democratic nominee Hillary Clinton, as Mr. Trump's standing has dropped in recent polls after engaging in an argument with the parents of a Muslim American soldier who died in Iraq."
POLITICO: "Trump changed views on Ukraine after hiring Manafort"
Ari Melber reports on how Trump's Muslim immigration halt would work.
Alex Jaffe has the details on what you need to know about Paul Ryan's primary challenger.
Meg Whitman will vote for Hillary Clinton.
NBC's Alex Seitz-Wald reports on the DNC's shakeup after the leak of controversial internal emails.
And from the Washington Post: "U.S. District Court Judge Gonzalo P. Curiel on Tuesday rejected a request by media organizations to allow the public release of hours of videotaped testimony by Republican presidential candidate Donald Trump in a California lawsuit over Trump University."