This week, Senator Merkley also threw his support behind Democratic Senator Mary Landrieu's plan to allow the grandfather clause to be clarified, so to prevent people from losing their plans.
Some plans were to be grandfathered in, even though they didn't meet Affordable Care Standards, but they weren't.
Senator Landrieu says she's still pushing ahead with her legislation to make Obamacare better.
"I can't control other amendments. It's important to focus on the problems when they come up. And this is a problem and it needs to be fixed."
Landrieu's bill would allow insurance companies to keep offering plans that don't meet Obamacare standards indefinitely, as long as they explain the shortcomings to consumers.