An influential Republican senator on Wednesday said he doesn’t support a House-approved bill that aims to protect banks that work with the marijuana industry.

“I have significant concerns that the SAFE Banking Act does not address the high-level potency of marijuana, marketing tactics to children, lack of research on marijuana’s effects, and the need to prevent bad actors and cartels from using the banks to disguise ill-gotten cash to launder money into the financial system,” said Senate Banking Committee Chairman Mike Crapo, in a statement.