1.   But the Republican-controlled Congress has been trying hard to undo his decision.

2.   The insurance industry then began a lobbying campaign to effectively undo the decision by rewriting the law.

3.   The Republican leaders of the Legislature, eager to humble a court they describe in scathing terms, are promising to find some way to undo that decision.

4.   There were moves in Congress to undo the decisions.

5.   Answering a question he said he hoped the future government would not undo these decisions.