President Joe Biden’s re-election campaign is reaching out to voters who sided with one of former President Donald Trump’s top Republican primary opponents.

On Friday, the Biden campaign released an ad targeting Nikki Haley supporters, spending $1 million on the effort to court voters who appear disillusioned by another Trump nomination, The Washington Post reported. Haley was the last of Trump’s GOP opponents to drop out of the race when she ended her campaign earlier this month, and she has not endorsed the former president.

“If you voted for Nikki Haley, Donald Trump doesn’t want your vote,” the Biden campaign ad says. “Save America. Join us.”

The ad also plays clips of Trump commenting on Haley, such as him calling her “birdbrain,” and saying she “has made an unholy alliance with RINOs [and] never-Trumpers.”