A top House Republican says states should avoid setting up Obamacare exchanges as a way to protect insurance subsidies for their residents if the Supreme Court erases them on the federally-run marketplace.

“Oh God, no… The last thing anybody in my opinion would want to do, even if you are not a conservative, is consign your state to this law,” Rep. Paul Ryan (R-WI), the chair of the powerful Ways & Means Committee, told state legislators on a Thursday conference call, according to the Wall Street Journal.

Instead, Ryan urged them to sit tight while Congress works on introducing legislation to reform health care, saying it would drop by June 20.

“If people blink and if people say this political pressure is too great, I’m just going to sign up for a state-based exchange and put my constituents in Obamacare, then this opportunity will slip through your fingers,” Ryan said, per the Journal.