President Donald Trump’s oldest son appeared with right-wing provocateur Charlie Kirk at the event organized by Turning Point USA, a conservative youth group Kirk founded. Trump Jr. urged supporters of his father to vote in the lower-turnout Supreme Court election in two weeks.

“They can’t just show up when he happens to be on the top of that ticket,” Trump Jr. said of his father. “You have to engage because it’s not just about now, it’s about that future. This presidency can be put to a halt with this vote.”

Trump Jr. cast the Wisconsin Supreme Court race, which he dubbed “one little battle,” as essential to stopping Democrats who are determined to block the Trump agenda.

“It’s everything,” he said.