A former Air Force employee and military spouse is the latest Democrat to launch a campaign against Republican Sen. Susan Collins.

Daira Smith-Rodriguez filed her candidacy paperwork more than a month ago but formally launched her campaign on Thursday, hitting some of the same progressive and populist themes as other contenders in the increasingly crowded Democratic primary.

A former civilian contracting officer for the U.S. Air Force for nearly 15 years, Smith-Rodriguez said she stood up to the "military industrial defense complex" during negotiations and that she would bring those aggressive auditing and oversight skills to the Senate.

In her campaign video , the Democrat also went after the food industry as she is shown walking through the aisles of a supermarket.

"The oligarchy i

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