(CNN) — Anyone watching the Democratic National Convention on Tuesday night heard the number 4.5 million several times.
"Despite incredible odds and united Republican opposition, our president took action, and now we've seen 4.5 million new jobs," San Antonio Mayor Julian Castro, the party's keynote speaker, said.
Chicago Mayor Rahm Emanuel, who served as President Barack Obama's chief of staff, and Massachusetts Gov. Deval Patrick, who followed Obama's November rival Mitt Romney as governor of Massachusetts, both cited the same number.
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It's a big-sounding number, given the still-sputtering job market. So we're giving it a close eyeballing.