Democrats will try to shine a spotlight on GOP presidential candidate Donald Trumps record on workers rights by calling Trump a scab as the Labor Day holiday signals the unofficial start of the fall campaign season.

The Democratic National Committee is set to display 19 digital billboards in the swing states of Michigan, Wisconsin and Pennsylvania on Monday as its first paid media buy to kick the season off, a Democratic adviser told HuffPost exclusively.

The billboards, in English and Spanish, will show an unflattering picture of Trumps face next to the caption Trumps an anti-union scab! and will appear in a mix of high-traffic and other locations in those swing states.

He has proven over and over again that he does not care about working Americans, and if he regains the Oval Office, he will answer only to his big-dollar friends and donors, said DNC spokesperson Maddy Mundy.

The buy is not big by presidential campaign standards, but it shows Democrats intent to remind voters of Trumps anti-union record, according to Brad Woodhouse, a senior adviser to the DNC.

We were really kind of channeling Shawn Fain with that choice, Woodhouse joked, referring to Fain, who heads the United Auto Workers, wearing a T-shirt that called Trump a scab during his speech at the partys national convention recently. A scab, in union parlance, is someone who doesnt respect a picket line and instead walks through it.

And Labor Days a good opportunity to lift that up, Woodhouse said.

Woodhouse estimated the whole ad buy will only be about $25,000 to $30,000.