'Middle class Joe' makes his case

First: President Biden spends Labor Day in Philadelphia, hoping to convince the union rank and file he's still their man in Washington and deserves another turn in the White House. 

Plus: The Republican primary is still Donald Trump's to lose. But are the four criminal indictments a sugar high, putting the former president in danger of a general election crash. 

And: New reporting from CNN's Capitol Hill team underlines the mountain Congress needs to climb -- and climb quickly -- to avoid a shutdown. 

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