After Shooting, Alleged Gunman Details Grievances in ???  Suicide Notes???  —  A man claiming to be Bryce Williams called ABC News over the last few weeks, saying he wanted to pitch a story, and wanted to fax information.  He never told ABC News what the story was.

Biden donors lying in wait  —  Major fundraisers for Joe Biden's past campaigns have not committed to Hillary Clinton, leaving the vice president's allies convinced he can win the financial support necessary to challenge her.  —  Biden would face a financial giant in the Clinton campaign …

White House pushes for Iran filibuster  —  The administration seeks to tamp down expectations, but the numbers of supportive Senate Democrats are adding up.  —  President Barack Obama's almost certain to get the Iran nuclear deal through Congress — but whether he gets there by filibuster …

MSNBC moves Al Sharpton to Sunday mornings  —  Al Sharpton is leaving MSNBC's weekday dayside lineup, and moving to Sunday mornings.  —  Sharpton's last weekday “PoliticsNation” will be Sept. 4.  He moves to Sundays a month later on Oct. 4, according to a memo sent to MSNBC staff …

Inside the Trump-Bush melodrama: Decades of tension and discomfort  —  Donald Trump spent a day in January 2014 hobnobbing with politicians at the Trump International Golf Club in West Palm Beach, Fla. The billionaire mogul touted legalizing gambling with state House Speaker Steve Crisafulli …

Hillary Clinton Takes ‘Responsibility’ for Email Use, Saying It 'Wasn't the Best Choice'  —  Hillary Rodham Clinton waited to be introduced Wednesday at the Des Moines Area Community College in Ankeny, Iowa.  —  Hillary Rodham Clinton said Wednesday that she understood why people had questions …

Almost None of the Women in the Ashley Madison Database Ever Used the Site  —  When hacker group Impact Team released the Ashley Madison data, they asserted that “thousands” of the women's profiles were fake.  Later, this number got blown up in news stories that asserted “90-95%” …

EARLY CONCERNS  —  Obamacare included member-run, locally based nonprofit insurers to increase competition for existing carriers.  The idea initially worked: Nevada Health CO-OP had more than a third of the market in the 2013 enrollment period, beating out big, publicly traded competitors UnitedHealth Group …

Facebook Launches M, Its Bold Answer to Siri and Cortana  —  Today, a few hundred Bay Area Facebook users will open their Messenger apps to discover M, a new virtual assistant.  Facebook will prompt them to test it with examples of what M can do: Make restaurant reservations.  Find a birthday gift for your spouse.

Pollsters dumbfounded by Trump  —  Polling experts agree on one thing when it comes to Donald Trump's presidential run: They've never seen anything like it.  —  The businessman's dominance of the Republican presidential race is forcing experienced political hands to question whether everything …

South Carolina GOP chafes under Graham  —  Party leaders don't think their senator can win but don't feel free to endorse someone else.  —  South Carolina's Republican power brokers are facing a Lindsey Graham dilemma.  —  Wide-open nominating contests don't happen every day …