

"So, Mr. Secretary, before you go, of course we won’t put you in the awkward position of talking about the other Democratic candidates. But some might ask why wouldn’t you run, during this crucial time, for president of the United States?" she said during an interview on "Morning Joe."

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Kerry, who served as secretary of State under former President Obama, was on the program to promote his climate change organization, World War Zero, and to discuss the group's initiatives.

Kerry lost to former President George W. Bush in 2004 by a 286-251 margin in the Electoral College.