Washington (CNN) Steve Bannon labeled Arizona GOP Sen. Jeff Flake a "total embarrassment" and said Mitt Romney "hid behind" his Mormon faith to avoid military service in Vietnam during a Tuesday night campaign rally for Alabama Senate hopeful Roy Moore.

A day after Romney, the 2012 Republican presidential nominee, had tweeted criticism of Moore's honor and integrity, Bannon said that Moore, a Vietnam veteran, "has more honor and integrity in a pinkie finger than your family has in its whole DNA."

Bannon headlined a Moore campaign rally Tuesday night -- one week from the December 12 special election to fill Attorney General Jeff Sessions' former seat -- in Fairhope, Alabama.

It came a day after Trump called Moore and offered his endorsement, despite Moore facing accusations that he pursued sexual relationships with teenage girls -- including a 14-year-old -- while he was in his 30s.

"Mitt, here's how it is, brother: The college deferments, we can debate that -- but you hid behind your religion. You went to France to be a missionary while guys were dying in rice paddies in Vietnam," Bannon said of Romney. "You had five sons, not one day of service in Afghanistan and Iraq. ... Where were the Romneys during those wars?"

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