President Obama again showed his devotion to the White Sox this week when he joined Twitter -- @POTUS -- and followed every major pro team in Chicago except the Cubs. Obama picked up more than 2 million followers himself in the first three days of having an account. (For what it's worth, the Cubs have less than 600,000.)

Another newcomer to Twitter is Tony Romo. If there's one thing that the president and Cowboys quarterback have in common, it's a legion of trolls waiting to pounce on their accounts.

Who else should enter the Twitter fray? We consider on this episode of The Rundown:

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