GREENSBURG, Pennsylvania — Hours ahead of former President Donald Trump’s rally to support Mehmet Oz’s bid for the Republican nomination for the U.S. Senate seat in Pennsylvania, former CIA Director and Secretary of State Mike Pompeo held a press conference with reporters raising security concerns about Oz’s ties to Turkey.

The longtime New Jersey resident and celebrity doctor holds dual citizenship; on Wednesday, ABC News reported Oz voted in Turkey’s 2018 election. Oz previously said he was never involved “in any capacity” in Turkish politics. In that report, an Oz campaign spokesperson confirmed the allegation but denied that voting in the Turkish elections was considered being involved in Turkish politics.