President Trump told U.S. diplomatic employees Thursday that he discussed with Steve Schwarzman whether Hunter Biden had helped secure $1.5 billion from the Chinese government for an investment fund.

The remarks, reported in The Washington Post, threatened to draw Schwarzman into the politically fraught investigation of Trump’s efforts to get the Ukrainian government to investigate Hunter Biden, son of Democratic presidential candidate Joe Biden.

Schwarzman, who has advised Trump on Chinese matters and has sometime functioned as a go-between with the Chinese government, issued a statement flatly denying that he’d discussed Biden with Trump.

“Steve never spoke to the President about Joe Biden or his family, nor has he had any conversations with the Chinese about Biden or his family,” the Post quoted a Blackstone spokeswoman saying.

In his remarks to the U.S. delegation to the United Nations, Trump himself suggested that Schwarzman didn’t want to be drawn in, according to the Post, which reported:

Trump said he asked Schwarzman how that could happen [that Biden could raise such a sum], and the executive responded: “Maybe I shouldn’t get involved, you know it’s very political.”