Republican senators who publicly oppose the bill ← Less conservative More conservative → ← Less conservative More conservative → Republican senators who publicly oppose the bill Note: Ideology measurements are based on DW-NOMINATE scores, which are based on Congressional votes.

The four Republican senators whose opposition led to the collapse of the health care bill on Monday night fell across the ideological spectrum and they criticized the bill for different reasons.

Senator Susan Collins, of Maine, the least conservative member of the party based on voting patterns, was the first to come out against it, citing deep cuts to Medicaid.

Senator Jerry Moran, of Kansas, generally a reliable Republican vote, announced his opposition on Monday, along with Senator Mike Lee of Utah. Mr. Moran said he was concerned about how the bill would affect access to health care in rural areas and how it would effectively penalize states, like his home state of Kansas, that did not expand their Medicaid programs.

Among conservatives, Senator Rand Paul, of Kentucky, and Mr. Lee have long called for a full repeal of the Affordable Care Act, also known as Obamacare. Mr. Paul criticized the insurance stabilization fund in the Senate bill as “crony capitalism,” while Mr. Lee said the bill did not go far enough in lowering premiums or in repealing the Affordable Care Act’s taxes and regulations.

The vote had already been delayed because of the absence of Senator John McCain, of Arizona, who had an operation to remove a blood clot on Friday.

The health care bill needed at least 50 votes to pass, with Vice President Mike Pence ready to cast a tiebreaking vote. Every Democrat opposed the legislation, which meant three Republican “no” votes were enough to block it.

Here is every senator’s stance on the bill, based on their statements and on news reports:

52 No 2 Concerned 32 Unclear 14 Supportive

The full list of lawmakers’ positions:

Republican Democrat Independent