Donald Trump pivots to lies and attacks after calling for unity in his RNC speech. Also, the Biden campaign focuses on trying to flip North Carolina. Plus, Jack Smith appeals Judge Cannon's dismissal of the Trump classified documents case. And Trump continues to call American cities "horrible." Stuart Stevens, Jennifer Rubin, Anderson Clayton, Andrew Weissmann, Joyce Vance, and Mayor Cavalier Johnson join Jonathan Capehart.

Vice President Kamala Harris pledges to unite the Democratic Party. Also, New York's Democratic delegates vote to support Harris. Plus, Harris holds her first presidential campaign rally in Wisconsin. And the Harris candidacy reshapes key Senate race strategies. Rep. Joyce Beatty, Gov. Kathy Hochul, Ben Wikler, and Sen. Gary Peters join Lawrence O'Donnell.