Senator Cynthia Lummis (R-WY) is not a fan of the Securities and Exchange Commission's crackdown on the cryptocurrency industry. Now she is vowing to block one of the agency's controversial new crypto policies.

"I think the SEC is overreaching,” she said during a wide-ranging interview with Yahoo Finance this week.

The SEC is in the middle of an aggressive effort to rein in the crypto industry on a number of fronts, with lawsuits pending against a number of big players including Coinbase and Binance.

One of its policies that affects the industry — issued in March 2022 as "Staff Accounting Bulletin 121" — asks that any financial firms holding customers' crypto assets do so on their own balance sheets while warning investors about the risks of safeguarding those assets. The GAO said this week that the SEC should have sent this policy guidance to Congress for its approval.

Lummis now vows to block it from becoming binding, citing it as another example of overreach by the SEC. Lummis, who believes she can garner support for this effort in next few weeks in the Senate and the House, says the bulletin could hurt consumers if a digital asset custodian were to collapse.

"It's not a common-sense rule," Lummis told Yahoo Finance LIVE in an interview. "It was issued as a staff bulletin, but the bulletin is binding."

Lummis said she is working on other fronts to provide the crypto industry with more clarity in Washington, including a sprawling piece of crypto legislation co-sponsored with Senator Kirsten Gillibrand (D-NY) that would outline how the sector is regulated