After weeks of scrutiny for his focus on the Iran war and criticism for visiting Disney World during a partial government shutdown, Sen. Lindsey Graham (R-SC) is turning his focus closer to home: the campaign staffers of his primary election rivals.

Graham, facing two main GOP challengers in his reelection bid, assembled local media in Greenville, South Carolina, on Thursday to demand his opponents fire aides for months-old social media posts he described as indicative of a “small but growing problem” in the GOP of antisemitism that was undermining President Donald Trump’s war efforts.