Democratic National Committee (DNC) deputy chair Rep. Keith Ellison of Minnesota sported a T-shirt calling for the elimination of national borders while walking in a May Day parade on Saturday.

The Republican National Committee (RNC) on Monday published a video of Ellison greeting parade marchers in Minneapolis while wearing the shirt, which read, “yo no creo en fronteras.” That translates to “I don’t believe in borders.”

WATCH:

Just under one third of Democrats, 32 percent, support “basically open borders,” a Harvard-Harris Poll found in January.

Ellison has stirred controversy before with his embrace of hard left politics. (RELATED: Keith Ellison Has A History Of Support For Radicals)

He was revealed earlier this year to have lied for years about his relationship with Nation of Islam’s Louis Farrakhan, a notorious racist and anti-Semite.

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