Binance CEO Richard Teng has dismissed claims that the cryptocurrency exchange helped boost a Trump-backed stablecoin before former CEO Changpeng Zhao received a presidential pardon.

The claims in question relate to a $2 billion investment Binance received from Abu Dhabi’s state-owned investment firm MGX. The deal was settled using USD1, a stablecoin created by the Trump family’s crypto venture, World Liberty Financial.

MGX’s investment and Binance’s subsequent listing of USD1 on its exchange helped bolster the stablecoin’s usage and credibility, with some lawmakers and reports suggesting this may have influenced the pardon of Zhao, commonly known as CZ.

However, in a CNBC interview on Monday, Teng rejected the notion that Binance — the world’s largest cryptocurrency firm — had given USD1 any preferential treatment.

“First of all, the usage of USD1 [for the] transaction between MGX as a strategic investor into Binance, that was decided by MGX ... We didn’t partake in that decision,” Teng said.