Top Republicans will try to force more transparency at the party’s national convention in July, aiming to scrap their 1,500-page rule book in favor of simpler procedures that they hope will head off arcane maneuvers designed to deny Donald Trump the presidential nomination.Source: RNC weighs scrapping convention rule book to head off anti-Trump maneuvers...

California's primary amounts to 54 separate races on a single day — one in every congressional district across the sprawling, diverse state, and one statewide. The winner in each district collects three delegates; then, the candidate who gets the largest number of votes statewide claims a bonus of 13 more.That means a solidly Democratic district covering the heavily Hispanic neighborhoods...