A spokeswoman for Sen. John KerryJohn Forbes KerryNorth Korea is moved by Pompeo diplomacy, but Dems dig in deeper Ex-Obama official Marie Harf, Guy Benson to co-host Fox News Radio show Five things to know about Russian oligarch Oleg Deripaska MORE (D-Mass.) dismissed questions surrounding his possible appointment to President Obama's cabinet, calling them a "ginormous waste of time."

"The speculation season is a ginormous waste of time. Senator Kerry's only focus is his job as senior senator from Massachusetts and Chairman of the Foreign Relations Committee and that's not changing," Kerry spokeswoman Jodi Seth wrote in an email to The Hill.

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Speculation has been swirling over Kerry's possible appointment to either secretary of state or secretary of defense, as shuffling is expected to occur over the next year. Secretary of State Hillary ClintonHillary Diane Rodham ClintonJustice to provide access to Comey memos to GOP lawmakers Justice Dept inspector asks US attorney to consider criminal charges for McCabe: reports 'Homeland' to drop Trump allegories in next season MORE has said she wants to step down and Defense Secretary Leon Panetta is also expected to retire.

Kerry has declined to comment on whether he'd be interested in taking either post, but he has been known to want the State Department job. Lawmakers and Democrats familiar with his thinking have expressed surprise at reports that he's being considered for Defense secretary. That speculation began after talk that Obama may want U.N. Ambassador Susan Rice to replace Clinton.

One Massachusetts Democratic strategist and former Kerry campaign adviser said it was unexpected.

"Everyone got thrown for a loop with the Kerry, Defense thing here," the strategist said.

And Sen. Kelly AyotteKelly Ann AyotteAudit finds US Defense Department wasted hundreds of millions of taxpayer dollars US sends A-10 squadron to Afghanistan for first time in three years No, the US did not spend million on a gas station in Afghanistan MORE (R-N.H.), a member of the Senate Armed Services Committee, told The Boston Globe she "certainly was surprised about hearing it."

If Kerry is appointed to either post, and if he chooses to accept the nomination, his seat would be filled by a special election. Such a situation would provide recently-defeated Sen. Scott Brown (R-Mass.) the opportunity to rejoin the Senate, after he steps down from his seat for Sen.-elect Elizabeth WarrenElizabeth Ann Warren'Fearless Girl' statue to be moved away from Wall Street bull Sanders, Warren, O’Rourke inspire patriotic small donor waves Overnight Health Care: GOP pushes stiff work requirements for food stamps | Johnny Isakson opens up about family's tragic loss to opioids | Republicans refuse to back vulnerable Dem's opioids bill | Dems offer new public option plan MORE (D) this January.