Final answer:
When a healthcare bill in the Senate receives votes only from one party, it means that the bill has only that party's support, indicating a divide along party lines.
Step-by-step explanation:
When a healthcare bill is introduced in the Senate and all members of one party vote for it while all members of the other party vote against it, the correct conclusion is that the bill has only one party's support, which in this scenario is the Republican Party. This voting outcome indicates a partisan divide on the legislation, and it does not show bipartisan support, which would require some members from both parties to vote in favor of the bill. Furthermore, the fact that all Democrats voted against the bill negates the possibility of the bill having unanimous support or being under consideration with no final decision.