A pair of top Democratic lawmakers asked the U.S. securities regulator on Wednesday to preserve records related to President Donald Trump’s crypto venture World Liberty Financial and posed questions about potential conflicts of interest.

In a letter sent to acting Securities and Exchange Commission Chairman Mark Uyeda, seen by Reuters, the lawmakers requested information to “help us better understand the extent to which the Trump family’s financial interest in World Liberty Financial may be influencing your and the Commission’s activities.”

Senator Elizabeth Warren, the ranking member of the U.S. Senate’s banking committee, and Representative Maxine Waters, the ranking member of the U.S. House of Representatives’ financial services committee, signed the letter, which cited a Reuters report this week about the crypto project.