Here's a roundup of news trending across the nation and world today.
What to know now:
1. Nine to appear onstage: The next Republican debate will be held Tuesday in Las Vegas, and CNN, the debate's sponsor, has announced the line-up. Featured on the stage for the main debate will be: Donald Trump, Ben Carson, Ted Cruz, Marco Rubio, Jeb Bush, Carly Fiorina, Chris Christie, John Kasich and Rand Paul. The early debate will feature Mike Huckabee, George Pataki, Rick Santorum and Lindsey Graham.
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4. Twitter hacks: Twitter is warning some users that “state-sponsored” hackers may have tried to gain information from their accounts. According to one of the users warned, Twitter said the hackers may have been trying to get email addresses, ip addresses, or phone numbers from accounts. Twitter has not commented on the warnings, but the notice said hackers had targeted a “small number of accounts.”