Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) - One sure-fire way to get the 2016 rumor mill churning is to promise you're not running for president. At a news conference Wednesday, Democratic Massachusetts Sen. Elizabeth Warren did just that.
"I pledge to serve out my term. I am not running for president. I am working as hard as I can to be the best possible senator I can be," said Warren.
But then-Senator Barack Obama said he wasn't running for president at one time. He obviously changed his mind.
Bloomberg View columnist Margaret Carlson, CNN political commentator and Republican strategist Ana Navarro, and CNN chief political analyst Gloria Borger discuss.