Tonight on The Last Word: Pennsylvania leads the U.S. in political ad spending. Also, former national security leaders endorse Vice President Harris. Plus, Manhattan District Attorney Alvin Bragg urges Judge Juan Merchan to reject Donald Trump’s bid to toss his conviction. And gun safety group March for Our Lives makes a historic endorsement. Sen. …

Tonight on The Last Word: President Biden relies on history to frame the existential election in a historic speech from the Oval Office about his decision to leave the campaign. White House Press Secretary Karine Jean-Pierre and Ron Klain join Lawrence O’Donnell.Από τον NBC News

Tonight on The Last Word: 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. Ga…

Tonight on The Last Word: Vice President Harris begins an historic presidential campaign. And NBC News reports the majority of pledged Democratic delegates endorse Harris on her first full day as a candidate. Rep. Lisa Blunt Rochester, Angela Alsobrooks, Zerlina Maxwell, and Simon Rosenberg join Lawrence O’Donnell.…

Tonight on The Last Word: 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 Rub…