Rep. Tammy Duckworth (D-Ill.) is blasting President-elect Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE for filling his Cabinet with recently retired military generals, saying it's a "real danger."

"We're the greatest nation on the face of the Earth, and the greatest democracy, because we're not a military junta," Duckworth, an Iraq war combat veteran and incoming senator, told David Axelrod on "The Axe Files" podcast, produced by the University of Chicago Institute of Politics and CNN.

"So we shouldn't be starting on that slippery slope towards it."

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The president-elect has selected several retired military generals to fill various posts in his administration. Those named include retired Lt. Gen. Michael Flynn for national security advisor, retired Gen. James Mattis for Defense secretary and retired Gen. John Kelly for secretary of Homeland Security.

Other Democrats have similarly expressed concern over the decision.

Duckworth during the interview called for Congress to "do its job and have full oversight and have the hearings."

Public hearings are necessary, she added, for "the American people know what the dangers are and what's at stake."

Duckworth said she will judge nominees based on whether they're qualified for the post.

"If they're qualified to do the job, they're qualified to do the job ... even if I disagree with their philosophy," Duckworth said.

"If I think they can do the job, then that's the advise and consent role of the Senate."