With voting to take place next month, Trump’s endorsement has been a source for division. On Thursday, the group Ohio Value Voters was so incensed by Trump’s endorsement of Vance that it asked Republicans to “boycott” his Saturday rally.

“Ohio Value Voters urges Ohioans to boycott the Trump Rally in Delaware County this Saturday, April 23rd. However, it you decide to attend, when President Trump introduces JD Vance, make your voices heard by letting Trump know, JD Vance is Wrong for Ohio,” the group stated. “Booing is entirely appropriate!”

The nonprofit, which has endorsed Mandel in the race, called Trump’s endorsement of Vance “terrible.”

“This can only be attributed to very poor advice from people around the former President,” the group said. “At the start of the primary, there were many of us in 2016, which supported another candidate for President and not Donald Trump. However, no one at that time, used the vile and derogatory comments against Donald Trump as JD Vance.”