Just one day before the South Carolina Republican primary, a super PAC aiding Sen. Ted Cruz’s presidential campaign is attacking Donald Trump and Gov. Nikki Haley —who recently endorsed Sen. Marco Rubio — for supporting the removal of the Confederate flag from South Carolina’s capitol grounds following the deadly shooting at a historically black church in Charleston last year.

Schuyler Kropf of The Post and Courier reports that the group is urging voters to defend “our flag” from politicians like Trump:

A pro-Ted Cruz robo-telephone call is blasting Donald Trump for butting his nose into support of the Confederate flag coming down. The recorded message, coming late in the campaign, also takes a jab at Gov. Nikki Haley. “Put it in a museum, let it go,” the recording says, quoting Trump and his view on removing the flag. An announcer then picks up by saying “That’s Donald Trump supporting Nikki Haley removing the battle flag from the Confederate memorial in Columbia.” It adds “people like Donald Trump are always butting their noses into other people’s business,” and that “Trump talks about our flag like it’s a social disease.”

The controversy over the Confederate flag is still a pressing issue in the state: A recent Public Policy Polling survey found a majority of likely Republican voters support “the Confederate flag hanging on the capital grounds.” Support is particularly high among Trump fans (70 percent) and Cruz backers (62 percent), who were also more likely to say that they “wish the South had won” the Civil War.

Cruz never came out in support of or opposition to the Confederate flag’s placement, going only so far as to say that it should be a states’ rights issue.

However, the co-chair of his South Carolina campaign, state Sen. Lee Bright, was a vocal defender of the Confederate flag following the shooting, denouncing concerns about the flag as a distraction from debate over Satanic gay rights, while likening gay marriage and attacks on the flag as twin threats to states’ rights.

Bright also hailed the flag as a symbol of “freedom” and resistance to “federal tyranny.”