In a video posted to his YouTube page Thursday morning, Newark Mayor Cory Booker announced that he would not challenge Gov. Chris Christie, and instead will finish his second term. He also announced the possibly of a run for Senate in 2014.

"There's still a lot of work to do," he says. "And so, let there be no doubt I will complete my full second term as mayor of Newark, New Jersey. And as for my political future, I will explore the possibility of running for the United States Senate in 2014."

Booker — by virtue of his heroics and sense of humor — has become one of America's most popular (but maybe not best) mayors. This announcement puts to bed weeks — months, even — of speculation that he'd challenge Gov. Christie in next year's election.