TRUMP: NO APOLOGY!  — 'TRUMP IS TOAST ... Boom to bust': Luntz sees onslaught by veterans if no apology - HILLARY on Trump and GOP field: ‘can be hard to tell the difference’  —  By Mike Allen (@mikeallen; mallen@politico.com) and Daniel Lippman (@dlippman; dlippman@politico.com)

Democrats lose control of presidential event  —  Story highlights  —  Phoenix (CNN)A town hall for liberal activists featuring two Democratic presidential candidates was interrupted by dozens of demonstrators on Saturday who shouted down the contenders and demanded they address criminal justice issues and police brutality.

Scott Walker: 'I don't know' if being gay a choice  —  Story highlights  —  (CNN)In a weekend interview with Republican presidential candidate Scott Walker about whether the Boy Scouts should allow gay troop leaders, CNN's Dana Bash asked Walker, “Do you think being gay is a choice?”

Sanders vaults from fringe to the heart of the fray  —  SOMEWHERE OVER THE AMERICAN WEST — It's 7:20 a.m. and Bernie Sanders looks irritated.  He's already buckled into his economy seat on Delta Flight 4516 and an attendant just announced that the flight would sit on the runway for 30 minutes before taking off.

WATCH: ‘Reporting Tonight: Thomas Roberts,’ First Out Gay Man To Anchor Network News  —  NBC News pulled out its Nightly News anchor chair Saturday night for Thomas Roberts, the rugged and dashing MSNBC host who came out when it was still considered career suicide.

‘War is here on US soil’: Ft. Hood victim says Obama WH needs to get head out of a**  —  The White House has its head where it doesn't belong.  —  Saying the “war is here on U.S. soil,” a victim of the 2009 Fort Hood attack by Army Major Nidal Malik Hasan described the killing of four U.S. Marines …

Obama pushes to extend gun background checks to Social Security  —  Seeking tighter controls over firearm purchases, the Obama administration is pushing to ban Social Security beneficiaries from owning guns if they lack the mental capacity to manage their own affairs, a move …

KKK Faces Off With New Black Panther Group in Heated, Competing Rallies at South Carolina Statehouse  —  The Ku Klux Klan faced off with a group affiliated with the New Black Panthers Saturday at the South Carolina Statehouse, as opposing rallies attracting about 2,000 at one point led to a rock-throwing scuffle.

Muhammad Abdulazeez reportedly spotted at gun range before deadly attack  —  CHATTANOOGA, Tennessee(WDEF) - According to a tip that came into WDEF, Muhammad Abdulazeez was spotted at a gun range just weeks before killing four Marines and one Navy Petty Officer.