Article snippet: MIAMI — In a windowless conference room in downtown Miami, Julian Castro practiced answering mock debate questions while an aide kept an eye on the clock, raising two hands in the air whenever Castro spoke longer than one minute. Elsewhere in the city this week, another Democratic presidential contender, California Senator Kamala Harris, huddled with her advisers over Caribbean food. Massachusetts Senator Elizabeth Warren squeezed in one last rally with her final debate preparations. And New Jersey Senator Cory Booker’s aides passed around a memo laying out his goals for the mere 7 to 11 minutes he will likely speak onstage. Most of the Democrats seeking their party’s nomination are preparing to meet in Miami on their biggest stage yet beginning Wednesday, for a two-night, 20-candidate extravaganza that marks a new phase in the sprawling campaign to take on President Trump. The events will put household names like former vice president Joe Biden on the same stage as little-known Democrats like Andrew Yang, offering leading contenders a chance to prove their polling leads are about more than name recognition while giving upstart candidates an opening to grab the nation’s attention. But instead of wrestling with substantial questions about the future of the nation, the event will probably feel like speed-dating, with 10 candidates standing elbow-to-elbow each night, all trying to pack soaring rhetoric or clever policy prescriptions into the 60 seconds they have ea... Link to the full article to read more