LESTER HOLT (HOST): And Trump is not only taking shots at the left by any means, but from many major members of his own party. Especially over his attacks on a federal judge, attacks that House Speaker Paul Ryan today called indefensible. Late this afternoon, a GOP senator said he's un-endorsing Trump. But the candidate isn't backing down, saying his attacks were, quote, misconstrued. NBC's Hallie Jackson has more. 

HALLIE JACKSON: An uprising, unprecedented, and how fast it's unfolded. Today, Illinois senator Mark Kirk in a tough election fight, the first Republican to take back his endorsement, hoping he's not the last. 

[…]

JACKSON: For a party in revolt, out of options, and maybe out of time. 

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HUGH HEWITT: There's a real question tonight about whether or not the Republican Party will nominate him. A party's rules are not a suicide pact. 

Previously:

A Guide To Hannity's Desperate Defenses Of Trump

Seth Meyers Slams Republicans Supporting Trump After His “Incredibly Racist” Attacks On A Federal Judge

CNN's Trump Surrogate Calls Paul Ryan A Racist