Barbie's 2020 Campaign Fires Back at Trump Jr., Says Dolls Aren't Red or Blue

Barbie's new line of dolls meant to inspire all girls to raise their voices and get interested in public service quickly got political when Donald Trump Jr. got involved ... but the toy company's shutting him down.

Shortly after the Barbie 2020 Campaign Team -- made up of 4 diverse dolls including a candidate, a campaign manager, a fundraiser and a voter -- was unveiled to "expose girls to public leadership roles and pique their interest in shaping the future" ... Don Jr. used it to take a shot at Democrats.

Don tweeted ... "'Voter' Barbie must be a Democrat because she’s already wearing an 'I Voted' sticker and yet she’s got another ballot in her hand."

Not the most original joke, and according to the makers of Barbie ... it's also inaccurate.

A Mattel spokesperson tells TMZ ... "Barbie is not, and has never been, affiliated with a political party. Barbie has always encouraged girls to stand up for what they believe in and shows them they can be anything."

The Mattel rep adds ... "This doll set highlights a range of leadership roles to pique their interest in shaping the future and raise their voices – from the podium to the polls. This set also provides a tool to allow families to have conversations around important events and cultural moments through play."

Of course, Don Jr.'s joke comes as President Trump continues to push claims mail-in voting is fraudulent and will only benefit Democrats in the upcoming election.

Truth is, there are no facts to back that up ... just like Jr.'s jab at Barbie.