In May 2017 the House Financial Services Committee passed H.R. 10, the Financial CHOICE Act of 2017.
The bill would amend the Dodd-Frank Wall Street Reform and Consumer Protection Act, which includes the US Conflict Minerals Rule. The House of Representatives is expected to consider the bill in early June.
The bill can be found here: https://www.congress.gov/bill/115th-congress/house-bill/10