The four Senate sponsors of an Obamacare overhaul bill said it was only a matter of time before their bill, which was pulled Tuesday because of lack of support, would become law and replace Obamacare.

The four Republicans — Sens. Lindsey Graham of South Carolina, Bill Cassidy of Louisiana, Ron Johnson of Wisconsin, and Dean Heller of Nevada — blamed process and timing for the bill’s defeat. The bill was considered the last shot to repeal Obamacare by the end of the month when the GOP’s authority to pass a health bill with only 51 votes expires.